I am interested in various aspects of QCD, both perturbative and non-perturbative, and especially in those on the interface between the two. During the last five years I have been working on many different subjects, most notably higher twist corrections in QCD, QCD aspects of B-physics, hard exclusive processes and light-cone wave functions.

Phenomenology of particle physics, astrophysics and cosmology. Neutrino factories, gamma-ray bursts, cosmic radiations, the constituency of the universe.

In connection with the quark-gluon plasma formation I have been trying to find theoretical evidence for the presence of true collective effects in nucleus-nucleus collisions. Such effects, as abnormal absorption of the J/ particle may give an indication for the creation of extended regions of quark-gluon plasma, due to the overlap of interacting nuclear matter in a phenomenon analogous to percolation.

I am interested in phenomenology of processes with a large degree of computational complexity, either due to the occurrence of higher-loop diagrams or a large number of external particles. In order to arrive at sensible physical predictions, new computational techniques are constantly necessary. One of the important ingredients in this field is the availability of reliable and fast Monte Carlo event generators, and we are currently developing algorithms for multi-parton phase space integration in QCD processes.

In addition, I have recently also worked on quantum-field theoretical aspects of random number sets (sounds esoteric, but has direct experimental impact!), and on field theory in 0+0 dimensions.

My current research interests are concentrated around supersymmetric field theories and SUSY phenomenology. I am interested in softly broken SUSY theories in general aspect and in their renormalization properties in particular.

I am also involved in phenomenological analysis of supersymmetric extension of the Standard Model, prediction of superparticle mass spectrum in the framework of MSSM and extended theories as well as prediction of the Higgs boson mass .

My main field of interest is an interplay between particle physics and cosmology. Specifically, I was working on the problem of baryon asymmetry of the Universe, on cosmological phase transitions, on production of primordial magnetic fields in the Universe and on different particle physics candidates for dark matter. I am also interested in higher-dimensional theories that may provide a description of four-dimensional space-time.

I conduct research in Particle Physics Beyond the Standard Model (SM). In particular I am interested in supersymmetric extensions of the SM, and in the idea of embedding it in a more fundamental theory. Within this framework I work in the phenomenology (i.e. sparticle spectrum and supersymmetry breaking mechanisms) and cosmology (i.e. viability of inflationary scenarios) of string/M-theory inspired models, trying to relate physics at very high scales with observational constraints.

More recently I have also started looking into supersymmetric QCD, focusing on the existence of topological defects which are exactly solvable, and in recently proposed theories beyond the SM where the geometry of extra dimensions helps explaining the hierarchy between the Planck and the electroweak scale.

I work on precision tests of the SM and its extensions. This includes = 20 (i) studies of electroweak and QCD radiative corrections to precision observables measured at LEP and at present high energy colliders (like MW, the effective mixing angle etc.) and (ii) analyses of higher order corrections in important B physics phenomena (B-> Xs gamma, B0-B0bar mixing, etc). These technically involved studies are a necessary step for using precise data from modern experiments in an efficient way and for setting useful bounds on new physics scenarios. For example, they are of crucial importance for the indirect determination of the Higgs boson mass.

During the last few years, I have been working on the applications of particle physics models to Early Universe cosmology. In particular, I have been studying the properties of the cosmological phase transition which takes place if the Higgs particle ha the properties predicted by the Standard Model or its minimal supersymmetric extension.

Such a transition could be related to the matter-antimatter asymmetry observed in the present Universe. My other interests include the QCD phase transition and the properties of the deconfined quark-gluon plasma phase, primordial magnetic fields, cosmic strings, as well as the cosmological implications of neutrino masses.

The main emphasis of my recent work is on neutrino masses and mixings, in association with the generic fermion mass problem. This type of analysis directly links the neutrino mass structure suggested by the various experiments, to the flavour-structure of the fundamental theory.

I am also interested in the dependence of the neutrino masses and mixings under the energy running of the coupling constants, which may significantly alter the picture that would emerge from a symmetry at high scales.

In parallel, I work on supersymmetry phenomenology, with particular emphasis in models with lepton and baryon number violating interactions (R-violating supersymmetry).

My field of interest is the phenomenology of elementary particle interactions.

In particular, I have been involved in the computation of production cross sections of heavy objects (weak vector bosons, heavy quark pairs) in hadron-hadron and photon-hadron collisions in the context of perturbative QCD.

In the same context, I have studied deep inelastic scattering with polarized beams. I am presently studying Higgs production at the LHC.

I am also interested in supersymmetric extensions of the standard model. I have studied the mechanism of radiative gauge symmetry breaking in supersymmetic theories, and computed radiative correction to Higgs boson masses. At present, I am interested in the phenomenology of models with ultra-light gravitino.

For my Ph.D. thesis I am working on the Trigger and DAQ systems of the ECAL (Electromagnetic Calorimeter) on the CMS experiment. This detector will be integrated on the Large Hadron Collider, which will study proton collisions at E ~14TeV and with the challenging luminosity of 1.0E34/cm_s. The trigger system will perform the first step into the research of new physics reactions. I was engaged of studying the trigger efficiency on detecting electrons and photons in the endcap regions of the ECAL. Presently I am also studying the impact of selective readout techniques, using the ORCA framework, on the reconstruction of physics channels, namely in the Boson Higgs decays.

For my Ph.D. thesis I am working on DELPHI, one of the four universal detectors operating at LEP e+e- collider at CERN. I have performed analysis of the data collected by DELPHI at energies from 183 to 202 GeV. In this analysis measurements of the charged particle multiplicity and the multiplicity of neutral kaons and neutral lambdas in q ar q events where performed. The results where included in a paper submited to publication. Now I am working on the study of colour reconnection effects in hadronic decays of W pairs.

For my Ph.D. thesis I am working on the high energy electromagnetic processes in amorphous and crystalline media, in particular the various effects associated with penetration of high energy charged particles and photons through single crystals - the coherent radiation and pair production, channeling effects and production and polarimetry of high energy intense polarized photon beams. In 1999 I have participated on preparing, performing and experimental data analysis of the first part of NA59 experiment, which is devoted on the use of crystals for high energy photon beam linear polarization conversion into circular. It is considered to use high energy circularly polarized photon beams on investigation of fundamental problems of theory, for instance in order to measure G, the polarized gluon distribution in nucleons, which is necessary for understanding the spin crisis problem etc.

For my Ph.D. thesis I am working on the Pierre Auger Observatory project. This challenging detector was conceived to study Extended Air Showers generated by Ultra High Energy Cosmic Rays, above GZK cutoff (E> 10^19 eV). The Observatory is composed of two detectors: the Ground Array, for tracking of ground particles, and the Fluorescence Detector, for collection of fluorescence light generated by the shower and tracking of longitudinal profile. For this latter detector, I am contributing to the front-end analog electronics and signal reconstruction and to Data Acquisition. Installation should begin in September 2000, when I'll take part to detector setup and operation.

I graduated from the physics department of Moscow State University with a Master's degree in 1996. My Master's thesis dealt with the possibility of charmed nucleus production. My PhD dissertation, which I am completing at present, studies the pi^0 pi^0 eta-system produced in a charge exchange pi^-p-reaction within the framework of GAMS program. In 1999 I joined the group working on the SPHINX experiment (IHEP, Protvino, Russia). For this experiment, I will make a spin-parity analysis of certain baryon systems produced in pC-interactions at a 70 GeV proton beam of IHEP accelerator. This would include developing an appropriate spin formalism software and also data analysis software.

For my Ph.D. thesis I am working in NA49, a fixed-target heavy ion experiment at CERN. I have worked on pedestal studies of the TPCs of the experiment. Currently I am working on V0 finding; I have provided a program, which extends the previous software of the experiment to new kinematical regions, using also such tracks, which have been detected only outside the magnetic field (and which therefore have no measured momentum). Having Lambdas and Kaons in a wider kinematical range enables us to make a more detailed study of strange particle production in p-p, p-A and A-A collisions. Particle correlations are also going to be studied.

For my Ph.D. thesis I am working in the SND group of BINP, one of the two universal detectors operating at VEPP-2M e+e- collider in Novosibirsk. I have performed analysis of the data collected by SND at the energies of VEPP-2M near rho, omega, phi-resonances. In this analysis the measurement of the cross section e+e- -> eta gamma process and branches of decays rho, omega and phi mesons into eta gamma mode. Now I am working on the analysis of the SND data in 0,4 - 1.4GeV region, studing the process e+e- -> eta gamma in a multiphotons chanel. From the hardware side I am engaged shift at detector SND, monitoring its working status. And I am produce software for analysis experimental data.

For my Ph.D. thesis I am working on DELPHI, one of the four universal detectors operating at LEP e+e- collider at CERN. I have performed analysis of the data collected by DELPHI at 189 GeV and higher. In this analysis I am trying to determine triple gauge couplings (TGCs) from the single-W channel. At the moment I have only looked at the decay of this W into an electron or a muon. Besides this I am trying to determine the Wenu cross section using the above decay. From the hardware side I am engaged with the work of monitoring the performance of the DELPHI inner detector for some weeks during the running of the experiment.

I am working in the OPAL collaboration since April last year. First I performed an analysis looking for SUSY particles (sleptons) for the 189 GeV data. Presently I work on the ee->ZZ->qqll and ee->four-fermion final states analysis with the 183-202 GeV data. For the ZZ analysis we consider qar{q} and bar{b} final states separately using lifetime and event-shape tags in order to improve the cross-section measurement. From our results we can derive limits on anomalous ZZG and ZZZ couplings.

I am working on my PhD. thesis in the framework of the Czech collaboration of the Project Auger, an immense detector of extremely high energy cosmic rays, based in Argentina. Previously I worked on CELESTE, cosmic gamma-ray experiment based in France, where I participated on data analysis and acquisition as well as electronics testing and implementation. My current work consists in modelling of interactions of extremely high energy particles with the atmosphere, simulations of the detector performance and in future will include data acquisition and analysis with the aim of determining the characteristics of the primary particles.

For my Ph.D. thesis I am performing analysis of the data collected by NA49 experiment at CERN, which searches for signatures of quark-gluon formation in Pb+Pb collisions. Since about two years a sizeable part of the NA49 analysis activity goes also into a study of elementary hadronic processes. My analysis also concerns elementary interactions. For charged particles produced in p+p, pi+p, p+Pb and pi+Pb collisions, I am studying the correlation between transversal and longitudinal variables. A study of this correlation can provide the information on the internal dynamics of a given reaction. Recently, I have also started looking at the azimuthal angle correlations for p+p and p+Pb collisions.

I am a PhD student and will be doing my thesis on Run II data at the D0 experiment at the Fermilab Tevatron. Currently I am involved in upgrading the hardware and software of the D0 detector. Specifically, I am the main author for the online calorimeter monitoring. I am also working in the graphics display of the data for Run II in a eta-phi space and in 3D space. Another of my responsibilities is writing a fast monte carlo simulation for electromagnetic particles and jets inside the detector. This fast monte carlo will be of wide use in next run. From the hardware side, I am working on the readout system of the Central Fiber Tracker. This task consist in develop software and testing electronics.

For my PhD thesis I am working on CDF, a general purpose solenoidal detector operating at the Tevatron p-pbar collider at Fermilab (USA). I am performing analysis of the data collected during the RunI phase of the experiment. In this analysis I am measuring the lepton angular distribution parameters in W decays, alpha1 and alpha2. This measurement represents a test of next-to-leading order QCD corrections, which are a non-negligible contribution to the W mass measurement, and the first measurement of the polarization angular paramenter alpha1 of the W. Also, as CDF is undergoing a major upgrade for operating at 2 TeV c.o.m. energy and high luminosity run, I am engaged in writing the calibration and alignment software for the reconstruction of the tracks in the new central tracking chamber.

I am a second year PhD student working on the BaBar experiment to study CP violation in B mesons. BaBar has just started to collect data and we are still learning to understand our detector. I am currently working on charged hadron identification using dE/dx. This will be vital for my analysis, studying charmless hadronic decays of B mesons. The branching ratios and asymmetries of such decays will give insights into tree/penguin contributions, direct CP violation and alpha. I am also partly responsible for the lowest level calorimeter trigger. I study the efficiency and tune the simulation as well as contribute to general maintenance.

I am doing my Ph.D, on the NA50 collaboration at CERN. NA50 studies heavy ion collisions at CERN SPS accelerator and searches for signs of the formation of the quark gluon plasma, most notably the J/Psi supression. I am analyzing the dimuon spectra intermediate mass region, in particular, the Drell-Yan and Open-Charm contributions. I have made my graduation thesis on NA50 experiment, and since then, I have been present at several data taking periods for monitoring and overall hardware control purposes.

I am working on ATLAS at LHC. I have performed a study of the expected systematic errors in the measurement of sin(2beta) in the B0->J/psiKs channel, by reconstructing B0->J/psiK*0(Kpi) and B+->J/psiK+ decays. This gave the first estimate of systematics in that channel at LHC. Now I am working on charged Higgs decay to tau nu_tau, for m(H+-) both below and above the top mass. The aim is to get information on the charged Higgs mass by using the different tau polarizations in W+- and H+- decays. High pT taus will also be studied in detail to extend the validity domain of tau parametrization in the fast simulation software.

I am presently working in the framework of my PhD thesis within the COMPASS collaboration; the experimental apparatus is seated on one of the SPS beam line at CERN. I will mostly dedicate my efforts to the software development for the simulation and event reconstruction making use both of the FORTRAN, C and C++ programming languages. Actually this is a futher developing with respect to what I did for my graduate thesis in which I optimized the second COMPASS spectrometer for the D.I.S. of polarized muon on polarized nucleon. In the meantime I will probably take part also to the development of the MWPC's front-end electronics and monitoring software, another task among the ones the Turin group is in charge for.

My PhD Thesis is taking place in the framework of the H1 experiment at DESY (Hamburg) where 27.5 GeV electrons interact with 820 GeV protons. I am studying the diffractive production of rho vector mesons at high |t|. t, the square of the impulsion transfered at the proton vertex, plays the role of a hard scale and allows to test the QCD models. I first worked on the installation of a trigger adapted to the selection of rho events at high |t|, and I have now started analysing the data.

As a PhD student I am a member of the AMS collaboration, an experiment to search for dark matter, missing matter and antimatter in space. I am actively participating in the analysis of the data collected on the precursor Shuttle flight in June 98. My main contribution concerns the search for antinuclei. An upper limit on the flux ratio of antihelium to helium of 1.1e-6 was obtained. I was responsible for the software of the AMS manipulator, a device for rotation and displacement of the detector, used in two after-flight alignment and calibration test-beams. In order to test the silicon microstrip detectors, which will be assembled for AMS phase 2, an automatic laser system has been developed.

Carsten Cruse

University of Dortmund

exp. Physik EVb

Otto-Hahn-Str. 4

44221 Dortmund

Germany

As a PhD student I am working on the muon pretrigger of the HERA-B experiment. The aim of HERA-B, located at the HERA collider at DESY, Germany, is to study the system of neutral B mesons with the main emphasis on CP-violation. My responsibilities include the development, test and installation of hardware components for the muon pretrigger system which is part of the HERA-B triggerchain. As the installation of the experiment will be finished in spring this year, performance studies and efficiency analysis started. My PhD thesis will be on the analysis of HERA-B data, especially data using the muon pretrigger system.

I am a second year PhD student currently based at CERN. Since July 1999 I have been a member of the OPAL collaboration and as such I am involved in the running and maintenance of the detector. In particular, I am in charge of the data acquisition system of the muon barrel sub-detector, which was designed and built at my home institution, Manchester University in the United Kingdom. The analysis I am working on at the moment aims at measuring the partial decay width of the W boson into a pair jets originating from charmed and strange quarks, by identifying strange final state hadrons among the decay products.

During last years my main activities were related to building of the ATLAS muon drift chamber production site in JINR. I was involved in development of drift tube and drift chamber testing technique and now I'm working on fine-tuning and putting final stitches to the hardware and software for high voltage and gas leak test stands. Since last year I've also been participating in HARP collaboration. This experiment is under very strict time constraints, because of this fast Monte Carlo simulation is necessary untill full simulation program is ready. Last months I was busy with this fast Geant 3 simulation for Detector layout optimisation and background condition studies. I'm also planning to participate in full detector simulation and data analyses, and my future thesis will be based on the results of this experiment.

I am performing my PhD Thesis on the D0 detector, one of the two experiments at Tevatron, the p-pbar collider at Fermilab (chicago). This experiment will start collecting data in March 2001. I am working on muon reconstruction algorithms in the muon chambers. In particular, I am in charge with associating hit segments to make muon tracks. From the analysis point of view, I am working on the discovery possibility of supersymmetric particles. I am studying the resonant production of sleptons in the R-violated SUGRA model. In this channel, it will be possible, even with few luminosity, to discover or to put new limits on supersymmetric particle masses.

I am a second year PhD student at Federico II University of Naples and I work in collaboration with the Italian National Institute of Nuclear Physics (INFN). I collaborate to the KLOE experiment, at the DAFNE factory located at National Laboratory of Frascati (L.N.F.). The main aim of KLOE is the determination of Re(epsilon'/epsilon) with an absolute error of O(10^-4), in the neutral kaon system. Among the general aims, light mesons spectroscopy is my actual research field. I am working to develop the data analysis of events which are being collected by KLOE for phi meson radiative decays. Among these decays I am looking for "phi---> eta (eta') gamma" decay whose branching ratio plays a key role in the problematic interpretation of eta-eta' mixing angle in the SU(3) symmetry breaking.

I am doing the first year of my Ph.D. thesis in a group involved in the construction of the electromagnetic calorimeter of the CMS experiment for the future Large Hadron Collider (p-p) at CERN. A prototype of 30 PbWO4 crystals of this calorimeter has been studied this summer in a beam-test. I contributed significantly to the data-taking and the analysis. We studied the performance of the prototype (energy resolution, position resolution ...) and compared the results to a realistic Monte Carlo simulation. We will shortly use a full simulation of the entire electromagnetic barrel to study Z -> e+e- events eventually to be used for the detector calibration and the reconstruction of H -> 2 photons events.

I am currently working on NA48 at CERN, which aims to measure direct CP violation in K0->2pi decays to very high precision. The experiment was carefully designed to minimize systematic errors. However, due to the very small scale of direct CP violation, systematic effects must still be well understood and measured. At present, I am analysing of some of these effects for data collected in 1998. My thesis topic is an independent analysis of the direct CP violation parameter on the 1999 data set, using an approach substantially different from the standard analysis. In particular, the approach is designed to independently measure the acceptance of the experiment to the various decay modes.

Since January 1998 I am a graduate student with the HERA-B group of the MPI for Physics in Munich. HERA-B is a dedicated experiment mainly to CP-violation in the neutral B-meson system via the decay B0 -> J/Psi + K0_s. This measurement tests the ability of the Standard Model to predict CP-violation via complex CKM-matrix elements. At the MPI we produce silicon microstrip detector modules for the vertex detector system (VDS) of HERA-B. To maximize acceptance these modules are located very close to the HERA proton beam and the wire target. The main purpose of the VDS is to precisely reconstruct all primary and all secondary vertices. In the data that will be taken in the first half of the year 2000 I will analyze particles containing b- or c-quarks. The measurement of lifetimes, cross section and branching ratios of heavy flavor particles will improve the precision of existing measurements and the measurements will serve to calibrate the HERA-B detector.

For my Ph.D. thesis I'm working on ATLAS. I'm interested by the Bc mesons production at LHC and their possible observation with the ATLAS Detector. I have also participated at the data analysis of the August 1999 TestBeam. In this study I attempted to compare the Simulation results with DICE (Module 0) with the test-beam results. Now I'm always working on the Bc physics.

My PhD work takes part in a large program "to track down the Higgs boson with a detector, GEANT : ATLAS and under aspects. A position detector or preshower detector, that will complete the internal part of the calorimeter electromanitical. It will be used to identify spatially the disintegration of the Higgs Boson into two photons. It will also provide an energy correction for electro calorimetric. This work is related to the settling of the building schedule and tests of presampler detector. It consists in studying the performances of this detector by the device of the simulation using the code DICE/GEANT. This leads to the determination of the energy solution at a fair level.

I am doing a PhD thesis within the HERA-B experiment at DESY. The aim is to investigate CP-Violation in the B meson system. For this measurement a special J/Psi hardware trigger was designed and built. A crucial part of this trigger is fast online track reconstruction. This is realised as a custom designed, programmable electronics board- the Track Finding Unit (TFU). I wrote some software to adjust receivers for optical transmission of detector data. Recently, I started focussing on the algorithm of track finding which is based on Kalman filtering. The thesis work will cover requirements (boundary conditions) performance, and comparison of simulation (MC) to real data.

I'm a PhD student working in Saclay on the NA48 CERN experiment. The subject of my thesis is the measurement of the direct CP violation parameter in the neutral kaon system, the main goal of the experiment. I have been involved in the analysis of 98 data, for which the collaboration has presented a preliminary result on February 29th. In particular my contribution was related to the study of the trigger efficiency which is one of the most important correction to the double ratio. The understanding of the inefficiency sources is relevant both for the evaluation of the systematic error and to estimate possible improvements on the hardware side. During the lasts two years of data taking I have developed the software for the monitoring of the charged trigger system, and I have worked on the implementation of the new online selection algorithm for the charged Kaon decays.

I have been working since 1995 on the CDF experiment, one of the two detectors operating at the Tevatron ppbar collider at Fermilab. In order to make use of the planned luminosity increase for the upcoming Run II, CDF is undergoing a major hardware and software upgrade. My main research subject is the characterization of the new tracking system in CDF. I have developed an alternative, fast track-finding algorithm for the 3D silicon vertex detector (SVX), to be used in the level 3 trigger and in offline analysis. I have studied its efficiency on simulated events; I plan to combine it with the level 1 and 2 trigger simulation, in order to estimate how CDF II could improve the current measurements in Bs physics. I am also extending the same algorithm to the Central Outer Tracker, a wire chamber placed outside the SVX.

Andrei Gheata

JINR, LHE,

Joliot-Curie 6,

141980 Dubna, Moskow region,

Russia

I am currently working on simulation software development for the ALICE experiment off-line project. ALICE is a heavy-ion experiment that will operate at LHC and it is designed to study the physics of strongly interacting matter at extreme energy densities. I have developed so far methods for detector visualization within the Alice-Geant4 code prototype that is intended to be one of the simulation tools of this experiment. Now I am working on the implementation of physics processes registration with the Geant4 toolkit. In future I intend to do extensive comparisons between Geant3 and Geant4 based experiment simulations.

I am currently working on simulation software development for the ALICE experiment off-line project. ALICE is a heavy-ion experiment that will operate at LHC and it is designed to study the physics of strongly interacting matter at extreme energy densities. So far I performed analysis of simulated data produced by the Geant4-based application: Alice-G4. In this analysis I have tested the geometry volume overlapping and the influence of this aspect on the stepping procedures and particle tracking during the simulation. Now I am working on the implementation of a graphical user interface for this application.

For my Ph.D. thesis I am connected to ATLAS, one of the four experiments which will be operating at the Large Hadron Collider at Cern in a few years. I am looking at the specific channel where in the MSSM-scheme, a heavy Higgs particle decays to two light Higgs particles, each of which decays to a b-quark and an anti b-quark. Another object of interest is the scenario in which effects from string theory, e.g. extra dimensions, are visible at the TeV scale or below, thus making them detectable at LHC.

U.S.A.

For my Ph.D. thesis I am working on the CDF experiment, which will observe pbar-p collisions at 2.0 TeV CME during the upcoming 'RunII' of the Fermilab Tevatron. The CDF detector is currently undergoing a major upgrade in preparation for the next run. Most of my time has been spent developing an optical relative alignment system which will be installed on the tracking sub-systems of the detector to monitor the time-evolution of their relative positions. This includes both hardware and software development. I am also working on the offline computing environment for analysis, which is moving from FORTRAN and PAW to C++ and ROOT, and on feasibility studies for potential thesis topics.

For my Ph.D thesis I am working on ATLAS, one of the two detectors that will exploit the full potential of the LHC p-p collision program. As Summer Student I have participated in the analysis ot the test beam data of a prototype of the Tile Hadronic Calorimeter (TILECAL). AT I.F.I.C, I have designed a photomultiplier test bench, to study the characteristics of the phtomultipliers that will be used in TILECAL of the ATLAS experiments. The studied characteristics are linearity, aging, quantum efficiency, etc..As visitor at LPC Clermont (France), I'm participating in the prototypes of a test bench dedicated to measure the main characteristic of all (~10000) photomultipliers of Tilecal. As a visitor at CERN, I have participated in the analysis of the test beam data of two prototypes of the Extended Barrel and one prototype of the Barrel of the Tile Hadronic Calorimeter (TILECAL), of the experiment ATLAS. Also as a visitor at CERN, I'm participating in the searches of the Higgs boson for H/A->ttbar channel, in the MSSM (Minimal Supersymmetric Standard Model) case, where the branching ratios are close to~100% for mH,mA>2mt and for tanb~1.

Current work: Finalizing a paper on an exclusive Bs oscillation measurement via Ds-lepton decays. An early version of this paper served as my MSc thesis, improvements are being made with the editorial board's help to produce an OPAL paper. Finalizing a paper on Br(b -> phi X), which is now starting the editorial board review.

Planned work for my doctorate: Check feasibility and value of a semi-exclusive Bs oscillation measurement either via phi-lepton decays or via kaon-lepton decays, at OPAL. Check feasibility of measuring Br(D -> phi X) at OPAL. Investigate usefulness of "dilution factor" customarily used in particle physics in comparison with "bits of information" as defined in communication theory. Which describes the usefulness of tags for likelihood fits better?

For my Ph.D thesis, I am working for the CDF experiment at the Tevatron collider at Fermilab near Chicago. I am doing a new measurement of the exclusive B meson lifetime, using data collected during the Tevatron Run I. The Tevatron is a p ar{p} collider with \sqrt{s}=1.8 TeV. Compared to the already published measurement, I will use more data,additional decay channels and an improved fitting technique. For the ongoing upgrade of the CDF experiment, I worked within theISL (Intermediate Silicon Layers) and SVXII (silicon vertex detector) upgrade groups, developing software to test readout hybrids and 'ladders' (hybrids with attached silicon sensors). The work includes the development of low level drivers, testing algorithms and a graphical user interface.

For my PhD.thesis I am working on the LHCb experiment, the dedicated CP-violation experiment at the future LHC pp-collider. I am currently working on the track reconstruction, specialised in pattern recognition and track fitting, to optimize the overall performance of the tracking detectors. As NIKHEF has main responsibility for the Outertracker of LHCb, much hardware development is going on. Close contact with the hardware/software groups is of crucial importance when designing the detector. Also I studied the B_s->D_sK decay channel for the Technical Proposal, which is one of the most important decay channels for measuring CP-violation in LHCb.

For my Ph.D. thesis I am working on L3, one of the four omni-purpose experiments at the LEP e+e- collider at CERN. I performed a search for the Standard Model Higgs Boson at center of mass energies from 192 to 202 GeV in the HZ -> four jets and HZ -> Leptons + Jets channels. As the year 2000 data become available, they will be included in the analysis, extending the sensitivity of the search to higher Higgs mass ranges. For the 189 GeV data, I analysed the final state with four charged leptons in Z pair events. I am also involved in keeping L3's Time Expansion Chamber and its DAQ chain running.

When I started in High Energy Physics I was lucky to join the ARGUS experiment located on the DORIS II storage ring at DESY. It was very successful experiment, e.g it first observed BBbar mixing. My analysis resulted in an upper limit for lepton number violation in the decays of tau to a Goldstone boson and electron or muon. Now I am working in the HERA-B experiment. HERA-B is designed to measure CP-violation. Now the detector is being commissioned and first data is coming for analysis. The software of HERA-B is also being commissioned and the part of the reconstruction chain such as matching of the different sub-detectors parts is my task. I am also involved in the calibration procedure of the electromagnetic calorimeter.

I am a PhD. student at Uppsala University working in the CELSIUS/WASA collaboration. Our experiment, being at the first stage of operation, uses high quality proton beam, an ultra-small pellet target system and a close to 4PI detector to study rare decays of pi0 and eta mesons. I have been working with the final assembly and calibration of the apparatus, in particular with the plastic scintillators used for fast triggering in the central part of the detector. Along with that I prepare and run Monte Carlo simulation to evaluate the data on production of eta mesons and their rare decays and develop particle identification and track reconstruction software.

For my thesis I am working on ATLAS Experiment. I am a member of QCD Working Group. The purpose of the first stage of my studies in this group is to investigate the possible differences in W and Z boson production in ATLAS, using various pdf's and the ATLAS selection criteria both for detector triggers and lepton isolations. As results of these investigations, the expected cross-sections for varios pdf's were shown and the contribution from ud~/du~ and cs~/sc~ initial states separated. The variation of the ratio for W+ and W- production with the set of used pdf's is found to be less than 4%. A similar study was done for Z production. Now, I study the theoretical predictions of these results, and will pursue theoretical investigations about the possibility of using Q and Z boson final states to normalize other cross-sections.

I am working on Transition Radiation Detector of the HERA-B experiment at DESY. The HERA-B is the experiment to study CP violation in the B system using an internal target at the HERA Proton Ring. The main goal of the HERA-B experiment is the CP violation measurement in "gold plated" decay mode B -> J/psi K. The project will make use of the J/psi -> l+ l- and K -> pi+ pi- decays reconstructions. Good lepton identification is one of the most crucial requirements of the spectrometer. The electromagnetic calorimeter is intended to provide the discrimination of hadrons against electrons and positrons at the level of ~100. Additional factor for electron/hadron separation in the central (with higher occupancy) part of the detector comes from the transition radiation detector. I am responible for readout system of TRD. I have developed the Front-End electronics, based on the ASDBLR chip. This Front-End electronics fully compatible with the common HERA-B DAQ system. Now the main activity is test and preparation of TRD readout system for physical run HERA-B

For my Ph.D. thesis I am working on CDF, one of two detectors measuring collisions of protons and anti-protons at Fermilab. I am currently involved in a feasibility study for the coming 2001 data run in searching for a high mass neutral particle decaying to t-tbar where the W's decay all hadronically. Until data time, my main responsibility for the upgrade is the Level III Consumer-Server/Logger which logs assembled events passing the Level III trigger while also handling the dispatch of events to online consumers.

I am currently conducting a search for Instanton induced events at the H1-Experiment at DESY for my Ph.D. thesis. Instantons are a non- perturbative effect in non-abelian gauge theories and QCD-Instanton induced events should be present in DIS explored at H1. Since Instanton induced events have a signature quite similar to DIS events and their predicted cross section for HERA is by a factor of 100 smaller than that of DIS, the search needs sophisticated separation techniques. I am therefore studying which multivariate separation techniques, including also neural networks, are able to discern between the Instanton induced events and the background. In addition to this physics analysis I am also responsible for the L2NN the Level 2 Neural Network trigger at H1, a fast hardware based trigger to identify various classes of physics events in DIS.

For my Ph.D. thesis I am working on the ATLAS muon spectrometer. Most of the ATLAS muon chambers are built out of high-pressure drift tubes. The tubes have to be positioned inside the chamber with a precision of 20 microns. To check the mechanical precision and the operational stability of the chambers, they will be tested in a cosmic ray test stand. I am developing the read-out as well as simulation and reconstruction software for this test stand. I am also investigating the reliability of electromagnetic shower production by high-energy muons in GEANT 3 and 4 with test-beam data. Finally I will study the process pp -> H -> WW -> 4 leptons with Monte-Carlo data.

I am working on the inner tracker of the HERA-B experiment. This experiment will start to take data within the next months. The aim of HERA-B is to measure sin2beta in the system of neutral B-mesons. Of the interesting B0 decays a large fraction of 45% passes through the region covered by the inner tracker. This tracking detector consists of 184 GEM MSGC detectors. In the course of my work the detector was implemented into HERA-B and it will now be commissioned. When the full system of our experiment is ready for data taking I will also take part in the analysis of physics data.

Now I am working in the Few-Body Systems Laboratory of the High-Energy Physics Department of PNPI. I take part in preparation of the polarization experiment ANKE (COSY, Juelich, Germany). My responsibility in this experiment is the GEANT Monte-Carlo simulation of the pp->pKL reaction. In this Monte-Carlo simulation I use existing code for the cross-section calculations, which includes diagrams of the one-pion and one-kaon exchange together with rescattering in the final state for proton-lambda and proton-kaon pairs. In order to distinguish between different possible reaction mechanisms I select kinematical regions where effect of the FSI for a given pair of the recoil particles can be clearly seen. For instance in case of the FSI of the proton-lambda pair one should choose small areas at the edges of the phase space where kaon momentum is either close to it's maximum or minimum value so that the relative momentum in the proton-lambda system is small. Such selection is feasible because the ANKE spectrometer can measure proton and kaon momenta with high enough resolution.

For my Ph.D. thesis I am working on CMS, one of the two omni-purpose experiment that will take data at the p-p collider LHC at CERN, starting from 2005. I am actually involved in the high level trigger for the muon system: this trigger, working on a commercial processor farm, should reduce the total rate from 100 kHz (level-1 output) to 100 Hz. I have studied and developed fast reconstruction algorithm for the pt assignment without the inner tracker, validating level-1 muon candidates and identifying non-prompt muons. This included large production and simulation of Montecarlo events. Now I am working on isolation algorithm, using calorimeter information and on the link with the inner tracker. The high level trigger should be finalized by 2001.

I am completing my PhD work on the NOMAD experiment, looking for strange particle production in neutrino interactions. A sample of neutral kaons and Lambda has been obtained, 10 times layer than previous analysis. Kinematical properties are extracted and a novel measurement of the Lambda polarization is achieved. The results tests several theoretical models and give information on the spin crisis of the nucleus. I present these results at the Moriond conference.

I started my PhD in summer 1999 in the BaBar-Group at the CEA-Saclay/France. BaBar is an experiment which will measure CP violation in B decays. It is located at SLAC and uses the new PEPII accelerator as B-factory. BaBar has been taken data since last April which I've started analysing. I'm studying the channels (B0,B+/-)->(Ks,K+/-)psi(2S), (B0,B+/-)->(Ks,K+/-)eta_c etc. The psi(2S) channel is only partially reconstructed (no J/psi reconstruction) to increase the statistics. The Ks+eta_c channel will provide an important cross-check to Ks+J/psi since it has opposite CP. I am presently studying reconstruction efficiencies and the background to these decay channels. The goal is to extract sin(2beta), with first results expected this summer.

Regis Lefevre

Laboratoire de Physique Corpusculaire

Universite Blaise Pascal

IN2P3/CNRS

63177 Aubiere Cedex

France

For my PhD. thesis, I am working in ATLAS, one of the two multipurpose detectors that will operate at the LHC pp collider starting at CERN in 2005. I have participated in the ATLAS detector and physics performance Technical Design Report on jet energy reconstruction. I am now applying the developed methods to the In Situ jet energy calibration problem using transverse energy or invariant mass constraints respectively in Z+jet and tt(bar) full simulated events. For what concerns the detector construction, the Clermont-Ferrand team works on the hadronic tile calorimeter. I am particularly involved in characterisation and quality control tests of the photomultipliers used for the light read out.

Guillaume Leibenguth

Kirchhoff Institut fur Physik

Schroederstrasse 90,

9120 Heidelberg

Germany

For my PhD. thesis I am working on ALEPH, one of the four LEP experiments at CERN. Using the data collected by ALEPH at LEPII, I am measuring the W boson mass via semileptonic WW decay modes. This analysis is currently part of the preliminary ALEPH W mass measurement which has been sent to the 2000 winter conferences. In addition to analysis, I worked as the ALEPH level 1 trigger expert for one year (1999). My current involvement with the ALEPH trigger includes online monitoring as well as offline data quality.

For my Ph.D. thesis I am working on the OPAL experiment at the e+e- collider LEP at CERN. I am searching in the data collected with OPAL at center-of-mass energies from 189 - 202 GeV for the production of single top quarks. In the Standard Model this process is strongly suppressed with cross sections of the order of 10**(-9) pb. In extensions of the Standard Model the Flavour Changing Neutral Current reaction e+e- -> tc_bar may be enhanced thus leading to measurable effects. Powerful selection criteria result from the characteristic kinematics of this process and excellent b-tagging techniques at LEP. Different selection methods, such as a cut based analysis, a likelihood selection and artificial neural nets are compared.

For my Ph.D. thesis I am working on Photon Spectrometer (PHOS), one of detectors at the ALICE experiment at LHC collider at CERN. I took part in beam tests of the PHOS prototype, where I was one of the persons responsible for DAQ system. I have performed calibration of this prototype. Analysing data collected in the beam test of prototypes of Charged Particles Veto (CPV) detector I have obtained results characterising the spacial resolution of the CPV and ability of the CPV to reject the charged particles hits on the front surface of the PHOS. Currently I am dealing with aliroot software in the frameworks of the ALICE project.

For my PhD. thesis I am working in ZEUS, one of the two ep-collider experiments at HERA. The goal of my analysis is the measurement of the proton structure function xF3 from neutral current deep inelastic events. The extraction of xF3 is obtained by combining the available double differential cross sections from electron and positron running at high Q2 (square of the four momentum transfer exchanged between lepton and proton) I have developed a method to extract xF3 from the data taken in the years 1994-1999. The method is optimised to have the smallest possible statistical error, and allows a significant measurement to be made of xF3 for Q2 values greater than 30.000 GeV2

My thesis topic concerns the development of a data acquisition system for the Frequency Scanned Interferometry (FSI) system. This is an online survey system for the ALTAS inner detector to measure the alignment of the tracking elements to 10 microns. It uses a tuneable laser and a fixed optical path interferometer to generate fringes. This is compared to a stabilised reference interferometer of a known length. One can then extract the unknown length to an accuracy of 1 micron. A network of approximately 1000 FSI interferometers are placed in the inner detector to form an overconstrained geodetic grid. All are readout simultaneously to provide an almost instantaneous map of the inner detector. In order to complement the hardware sections of my thesis I intend to carry out some analysis involving a measurement of supersymmerty at ATLAS.

I am a PhD student at Geneva University and I work with the Atlas experiment at CERN. In the first part of my thesis period I have studied the performances of the silicon micro-strip detectors that will be used in the inner tracker, with emphasis on their radiation hardness. To complete my thesis I have recently started to contribute to the investigation of the physics potential of the Atlas detector for the study of rare top decays. I will finally merge these subjects correlating the physics reach with the loss of resolution of the detectors in time.

Over the last two years I have been involved in preparatory studies for ATLAS, one of the experiments at the future Large Hadron Collider (LHC), and working on B-physics topics in the Innsbruck ATLAS group (IAG). For the ATLAS "Detector and Physics Performance Technical Design Report" (May 1999) I participated in studies on the potential of ATLAS to detect B_s oscillations, using the B_s-->D_s pi/a_ (hadronic) decay channels. Since then I have been working on further improvements and refinements of this analysis. Recently the IAG has joined the ATLAS B-physics level-2-trigger group, and I have been working on the trigger channel D_s-->phi0 pi, necessary for event selection for B_s mixing studies. This recent work will be input for the "ATLAS DAQ, HLT and DCS Technical Proposal".

For my Ph.D. thesis I'm working on the experiment E835 at Fermilab. This is a fixed target experiment which studies the spectroscopy of charmonium formed directly in proton antiproton annihilations. I work with the Ferrara group, which is responsible of the scintillating fibers tracker, in monitoring the performances of this detector. Now I'm working mainly on the offline of the experiment, in particular on the tracking program. I am also performing analysis of the adronic decays of charmonium, in particular of psi'in J/psi pi+ pi-.

ATLAS is one of the two general detector which will cover a large domain of physics at the next Large Hadron Collider at CERN. The laboratory where I do my ph.D thesis is deeply involved in the construction of the electromagnetic calorimeter. I work on the analysis of prototype modules test-beam. I studied muons signal to estimate the sample fraction of the calorimeter. Now, I am particularly interesting in energy reconstruction. I made an electrical model of all the readout and calibration system in order to understand response of the detector to calibration signal or particles and then calculate the ADC<->GeV coefficients.

During the first part of my PhD studies I was responsible for data taking and data quality of the VSAT detector in the DELPHI experiment at the LEP II ring. I am now analysing this data for luminosity calculations and two gamma physics. VSAT can register the two outgoing electrons from a gamma-gamma collision and a full description of the particle system is obtained. Presently methods for bhabha and off momentum background reduction and subtraction are being developed.

I am currently a PhD student at the Physical Institute of the University of Heidelberg and member of the OPAL collaboration. The subject of my scientific work is the search for charged Higgs bosons decaying into a CP-odd Higgs and a W Boson. These decays are predicted by general two Higgs doublett models. They lead too many final states of the charged Higgs Boson besides decays into quark pairs and tau+neutrino. Furthermore I participate in the LEP wide combination of the charged Higgs results from all four LEP experiments which result in charged Higgs masslimits. My technical support for the experiment is the maintenance of the DAQ system of the central drift chamber and participation in the calibration of the chamber.

For my Ph.D thesis I am working on D0, one of the two detectors operating at the Tevatron p-pbar collider at Fermilab. As the Tevatron and the two experiences are finalizing their upgrade program with the Run 2 start scheduled for march 2001, physics analysis can be done so far on the data collected by D0 at 1.8 TeV during the Run1 (1992-95). At the begininng of my thesis, I participated in the measurement of the W mass using electrons in the end-caps calorimeters, which allowed to reduce the W mass error from 110 MeV to 91 MeV. Now I am working on the search of the scalar top quark (stop) through its four-body decay mode into a LSP, a bottom quark and two fermions, which can be produced directly by pairs or via top quark decays. Besides I'm contributing to the upgrade effort, where the LPNHE is in charge of the pulser calibration system for the D0 liquid Argon calorimeter. This includes installation and commissioning of the calibration system, development of the online calorimeter calibration and monitoring software, and the determination of the calorimeter calibration performances.

In interactions antiproton proton with energy 2 TeV or proton proton with energy 14 TeV the pairs of top antitop quarks are produced. These quarks then decay (in about 99%) into intermediate bosons and b-quarks, which are registred as jets. Number of these jets can be 2,3, or more. But jets are also produced through other mechanisms of QCD and number of these cases is 10000 times higher than those from the top-antitop. In my work I am involved in searching these top-antitop productions using Monte Carlo generated events. With these results I will try to set the top quark mass and mainly its production cross sections in experiment D0 and ATLAS. For my work I use Pythia and Atlfast tools, which simulate the p-p collisions and the ATLAS detector influence.

I am working on L3, one of the experiments at LEP e+e- collider at CERN. For my Ph.D. thesis I perform the selection of e+e- -> W+W- -> qqqq events in data collected during the LEP2 phase at energy greater than 160 GeV. Moreover I study analysis methods to measure the mass and width of W boson by reconstructing the invariant masses from decay products; in particular during my degree thesis I have developed an unfolding method to the W-mass distribution, technique based on the B-Splines polynomial functions and adapted to the particular shape of this distribution. Furthermore I am engaged with the building of a Montecarlo Farm, located in the University of Rome, for the CMS experiment of LHC project.

For my PhD. thesis I am working on ALEPH, one of the four experiments operating at LEP e+e- collider at CERN. The work concerns searches for Higgs boson at high LEP energies specially on the four jets topologies. During the 1999 year, the analysis of data collected by ALEPH has allowed to set limits on the Higgs boson mass(es) in both Standard Model and MSSM models. Now I am studying the Two Doublets Higgs Model with the goal to set limits in all his space parameters. This model allows new final states than in SM and MSSM. Thus, specific analyses have been performed to a Higgs decaying in charm and gluon. The final task will be the combination of the results obtained at all LEP2 energies.

I have been preparing my doctorate in High Energy Physics for about one year collaborating in the BaBar experiment. BaBar is currently taking data at the Stanford Linear Accelerator Center (SLAC), in the only interaction region of the e+ e- asimmetric collider PEP-II. The Instrumented Flux Return (IFR) is the subdetector that provides muons identification down to about 0.6 GeV and neutral hadron identification. IFR is of particular interest in the CP-violating time-dependent asymmetry in B-> J/psi K0_L as a cross-check to the result in the "golden-channel" B->J/psi K0_s. My work is focused on the study of the timing information provided by this subdetector. This information can improve IFR performances: in a better spatial resolution, to improve hadronic shower pattern recognition; and in a more reliable measurement of strips multiplicity, that is the base for mu/pi separation. As a last step time information can provide a measure of neutral hadrons time-of-flight, giving great help in their identification.

I am presently attending the second year of my PhD. on the COMPASS experiment, which will be held at CERN on the 200GeV muon beam line M2. COMPASS main objective concerning the muon program is the measurement of the gluon contribution to the nucleon spin. My work consists in the development of large drift chambers for the first spectrometer of the experiment (Large Angle Spectrometer). The drift chambers will be located between the polarized target and the first spectrometer magnet, a region where a sensible inhomogeneous magnetic field is present. Moreover, the chambers will be subject to a high flux of charged particles (up to 400Hz/cm). This critical environment requires a precise optimization of the detector design (geometry, amplifying electronic, gaz mixture, etc). I am presently leading both hardware tests on smaller size drift chamber prototypes and tracking simulations to perform this optimization. I am also contributing to the development of the COMPASS Reconstruction ALgorithm (CORAL) in order to implement drift chambers and straw tubes data in the pattern recognition algorithm.

For my PhD thesis I am working on CMD2, one of the detectors operating at VEPP-2M e+e- collider at Budker Institute of Nuclear Physics. Doing hardware I am responsible for operation of drift chamber - main tracker of the detector. For data analysis I completed the study of five pion production at c.m. energies up to 1.4 GeV and am working now on analysis of the process e+e- --> pi+pi-pi0, measuring the energy dependence of this cross-section.

I have done some work for the HERA-B experiment at the proton-electron storage ring HERA (DESY,Hamburg) focused on the study of the CP-violation in the B Mesons system. I analysed data from the Si- Vertex Detector and applied them for the evaluation of the Target performance . Target data from Charge Integrators and Beam Position Monitors are compared with the vertices distribution. The study of the stability of the Interaction Rate distribution over many targets has been performed. Now I am working on the improvement of the multi-target operation studying target steering by faster (piezzo-electric) motors and Charge Integrators with much higher sensitivity.

For my Ph.D thesis, I'm working in ATLAS experiment at CERN, in the electron-photon High Level Trigger group. The e/g HLT provide an unified view from Level2 and Event Filter (which are the last two levels of triggering in this experiment) of the selection of electrons and photons, while outlining the issues affecting the physics and system performance. I'm involved in detailed studies on the physics performance (such as: signal efficiency and background rejection) and system performance (i.e. execution time, memory needed, bandwidth) of algorithms used for Event Filter trigger.

I am working for my Ph.D. thesis to study W-boson properties with the L3 detector which is one of the four detectors at LEP. Presently I am working on the selection e+e- ---> W+W- ---> qqen. The selection of the semi-leptonic chanel qqen is needed to determine total WW cross section, the mass and the width of W-boson and to study other W-boson properties. I have performed the analysis for 189 GeV data collected during the year 1998 and also analysing the data colleted in the last year at four center-of-mass energies, namely 192 GeV, 196 GeV, 200 GeV and 202 GeV.

For my Ph.D. thesis I am working on L3, one of the four detectors installed on LEP at CERN. The data collected with L3 detector is used to verify Standard Model and to look for new physics. My research activity within L3 collaboration is connected to search for neutral Higgs bosons of Minimal Supersymmetric Standard Model. I have analyzed data taken during 1999 run period when LEP operated at center-of-mass energies ranging from 192 up to 202 GeV. In my analysis I'm searching for h and A Higgs bosons via their hadronic decays into bb~ pair. The results of my analysis have been combined with other search channels leading to new improved limits on h and A masses. My hardware-related activity is connected with maintenance of L3 tracker operation. I'm responsible for monitoring the performance of Z-chamber, the outermost part of L3 tracking system.

I am working for my Ph. D. Thesis on the D0 experiment, one of the two TeVatron detectors at the Fermi National Laboratory. The p-pbar collider and the detectors are being upgraded for the next run at 2TeV centre-of-mass energy called RUN II, to begin in march 2001. My analysis will be the search of squarks and gluinos with jets and missing transverse energy signature. To improve the measurement of those quantities, I am working on new algorithms in oriented object language. I have already performed a new clustering algorithm to reconstruct particles in jets or close to jets. I will pursue in this direction by developing an algorithm using both the momentum measurement from the tracker and the energy measurement from the calorimeter. This combination would help improving the energy reconstruction. I am also engaged in testing the calorimeter calibration and I would like to work on the optimization of the online calibration.

I am working at the Nuclear Spectroscopy and Radiochemical Department, Laboratory of Nuclear Problems (JINR) for six years. Up to now our group involved in the experiment at JINR Synchrophasotron on investigation of the multifragmentation phenomena with 4p-setup "FASA" using relativistic light particle beams (p, 4He, 12C). I was involved in the development of combined model of intranuclear cascade calculations followed by statistical model, which takes into account the collective (expansion) flow in the system before break-up. My Ph.D. thesis work is dedicated to thermal multifragmenation in collisions of relativistic protons with gold. I am currently working on the theoretical analysis ("FASA" collaboration) of carbon data at 22.4GeV and helium at 14.6GeV.

Presently I am working for my doctorate thesis with the group of Humboldt-University Berlin on Higgs searches in e+e- interactions on the L3 experiment. My activity focuses on the search for an exotic Higgs decaying into two photons as it arises for example in models with at least two Higgs multiplets of type I. My analysis concentrates currently on the data collected by L3 at centre-of-mass energies between 189 and 202 GeV. In the near future I will study this process and its possible discovery with the CMS detector.

For my PhD research I joined the CERN NA48 collaboration. The experiment is aimed at studying direct CP violation in neutral K mesons by measuring the real part of the ratio epsilon'/epsilon. My interest lies in rare KS decays; in particular I am analyzing data taken during a dedicated run to search for KS decays into a neutral pion and an electron - positron pair and give a competitive estimate of its branching ratio. This analysis will also provide information to design an upgrade of NA48, dedicated to rare KS decays, to be carried out after the completion of the epsilon'/epsilon program. During the run periods my task is also to monitor the performance of the muon veto detector.

Since mid-1997 I have been working on my PhD. thesis for the HERA-B experiment which aims at the measurement of certain parameters necessary for the description CP-violation within the standard model. HERA-B is a fixed target experiment at HERA using only the proton beam on a target from several wires. At the beginning I studied in simulations the later tagging performance of the HERA-B detector and the reconstruction performance with an incomplete detector using the components which were completed first. This task included the development of reconstruction tools which are now in use to reconstruct the data taken since last autumn. Now I am working on the analysis of the J/Psi in the data which were taken up to now and the possibility to use it for a measurement of the bb cross section with the larger statistics which is expected within the next months.

For the PhD thesis I am developing a calorimeter prototype based on the technique of plastic scintillator coupled to wave length shifting fibers, read out with multi anode PMTs. We made ~300 scintillator bars with different dopants and different concentrations to study the light response efficiency. Each bar is made from 2 plastic bars realized with the injection molding technique, in which the plastic material is injected at high temperature and high pressure in a steel mould. I am in the middle of the analysis work, with the main target of determining the best resolution achievable in energy, position and direction of interacting particles. This type of detector could be used in neutrino experiments in CERN to Gran Sasso or in the Neutrino Factory projects.

For my Ph.D. thesis I am working at ZEUS, one of the two experiments studying ep interactions at HERA collider at DESY. I have been involved in the measurement of the diffractive gamma-p cross section in the intermediate Q2 region, based on the properties of the hadronic final state. At present I perform the analysis of the data collected with the Leading Proton Spectrometer of ZEUS, aimed at measuring the proton diffractive structure function F2D(4) at higher Q2. In addition, I am engaged in works on ZEUS BAcking calorimeter, including hardware control, data acquisition and data quality monitoring and software development. For almost two years I was the on-site online expert for BAC.

In interactions proton-proton with central mass energy 1.8-14 TeV the pairs of top-antitop quarks are produced. For my PhD thesis I occupy myself with interactions, which have two or one lepton in the final state produced by decay of an intermediate boson produced by decay of the top-antitop quarks. Leptons are experimentally well detected and the top-quarks have very short life-time, so these interactions are good for research of dynamics of top-antitop production. I am interested in spin-correlations of top-antitop pairs in these processes. In my work I use the simulation tools Pythia and Atlfast and examine the interactions produced in the Atlas detector.

Subject of my work for the laurea thesis and of my present work for the Ph.D. thesis is the analysis of the data collected by CHORUS, a high statistics hybrid experiment that searches for numu -> nutau oscillations. Neutrino interactions on a nuclear emulsion target were collected using the SPS wide band neutrino beam at CERN. I have studied the reconstruction of a hadronic decay channel of the tau which would be produced in nutau interactions; because of the high branching ratio of the hadronic decay mode, its detection would allow to increase the sensitivity to nutau interactions. At present I am also working on the momentum reconstruction by the hadronic spectrometer. The aim is to increase the precision on hadrons momentum measurement, so to better reject the main sources of background by using a more detailed kinematical analysis of the events.

My research field is astroparticle physics. For my PhD thesis I am working on CLUE (Cherenkov Light Ultra-violet Experiment) operating at La Palma (Spain). It is made up of 9 telescopes arranged in a square matrix. They collect the UV Cherenkov light produced by the particles of VHE atmospheric showers. The aim of my work is to reconstruct the characteristics of the primary cosmic ray (direction, impact point, energy, particle type). For this purpose I have developed data reduction procedures and I have performed Monte Carlo simulations testing the reconstruction routines. Now I am working on the analysis of the data set collected observing gamma-ray sources (Crab and MRK421), and the Moon, in order to measure the cosmic ray Moon-shadow deflection.

I currently am a Ph.D. student working with the BaBar collaboration. The BaBar detector was built to study the B mesons produced at the asymmetric B factory at SLAC. I have contributed to the development of a software toolkit for exclusive reconstruction of charged and neutral B mesons in a wide variety of modes. Now I am working on the extraction of clean samples of fully reconstructed B mesons for lifetime and CP violation studies, and on the lifetime measurement itself. I am responsible for a system that monitors the performance of both BaBar's DIRC, a novel device for PID exploiting the Cherenkov effect, and the corresponding reconstruction software.

For my Ph.D. thesis I am working in the Ukrainian team of the ALICE Collaboration of the future LHC at CERN. I have worked on the methods developing for the double-sided microstrip detectors (DSMD) characteristic measurements. In this investigations the suitability of the detector to the ALICE experiment requirements was analyzed and the data for required detector efficiency about 97% was obtained. Now I am working on the electronics set up and methods preparation for preliminary and for real beam testing of the DSMD spectral characteristics. This includes development of the monitoring software and data analysis. From the hardware side I am engaged with the work of monitoring the performance of the silicon microstrip detectors for Inner Tracking System of the ALICE experiment.

For my Ph.D. thesis I am working on ATLAS, one of the detector being designed to operate at LHC pp collider at CERN. Currently, I am involved in ATLAS Luminosity Group. The measurement of luminosity is vital for gaining high precision of measured cross sections of all processes in pp collision. A couple of methods have been proposed to achieve this, namely, by measuring the rate of QED process pp->ppe+e-(mu+mu-) with well known theoretical cross section or by using the optical theorem. My work is concerning the simulation of minimum bias events in pp collision with two Monte Carlo event generators: Pythia and Phojet. This leads to investigation of possible extension of ATLAS detector to cover wider rapidity range, thus improving ATLAS capability to measure inelastic and total cross section.

My focus on BaBar has been the Electromagnetic Calorimeter (EMC). I performed tests for the final review of the front-end electronics, as well as a preliminary calibration using cosmic rays. I have been working on an intercrystal calibration of the EMC using Bhabha events and understanding the relationship between this calibration and calibrations obtained by other methods. This permits a detailed understanding of the behaviour of the EMC from energy scales of 1 MeV to 10 GeV. Concurrent with work on the EMC, I have been developing analyses to study radiative electroweak penguins which will be the subject of my doctoral dissertation. The study of this process will begin with the exclusive measurements B->K*/rho/omega + gamma, where the two body kinematics and monoergetic photon provide excellent experimental signatures. I am now coordinating the data processing for this analysis. These measurements in hand. I will proceed to the inclusive measurements.

For my PhD thesis I worked on the CDF experiment, at the Tevatron accelerator. Part of my work concerned the analysis of the CDF data at a center of mass energy of 1.8 TeV. Goal of my analysis was to study the amount of ambient energy (due to underlying events, initial state radiation, ... ) both in jets and in minimum bias events. I performed a comparison between data and simulation using the HERWIG montecarlo program. At the moment I am analyzing the CDF data at 630 GeV center of mass energy, in order to extrapolate the results at the LHC energies and to apply them to the simulation of jet events in the ATLAS detector.

For my PhD thesis I am working at L3, the largest of the four detectors at LEP. I work in the Higgs group. My task is to search for charged Higgs boson pairs (appearing the 2-doublet extension to the Standard Model) in the data acquired by L3 in 2000, the last year of LEP operation. I am also actively involved in doing shifts at the tracker system, the innermost detectors of L3: the Silicon Microvertex Detector and the Time Expansion Chamber.

I am a PhD. student in particle physics at IPNL (Institut de Physique Nucleaire de Lyon). I am currently working on Higgs search in L3 collaboration at CERN, taking part in L3 Higgs Working Group activities, especially the Hnunu (two jets and missing energy) channel. I will soon begin a ZZ precision measurement analysis in the same topology. I am using three different methods in order to separate the searched signal from the Standard Model backgrounds: sequential filter, neural network and likelihood. The optimisation of the analysis is essentially based on the good understanding of the second level (neural network).

For my PhD thesis I am working on DELSY (Dubna Electron Synchrotron). This project is aimed to construct a synchrotron radiation source of the 3d generation at JINR. DELSY will be constructed on the base of the accelerator facility of NIKHEF (Netherland), which is being dismounted and transferred presently to JINR. My main task was a calculation of very new lattice of DELSY storage ring, which allows forming an intense electron beam with very low emittance. Now I am finishing the calculation of the influence of the insertion devices on the beam dynamics in DELSY storage ring.

For my Ph.D. thesis I am currently working in the Muon System Group of the HERA-B experiment. HERA-B is a hadronic B-factory at the HERA proton-electron collider at DESY, where B-mesons are produced via interactions of 920~GeV/c beam halo protons with an internal target. My first task was devoted to the subject Muon Identification and Background Analysis within the HERA-B spectrometer. As a result of this work, detailed analysis of the background for muon identification was presented, and a method for improving muon identification was proposed. After that, I took part in aging studies for the muon proportional drift chambers used in the HERA-B experiment. The results of this study helped in choosing gas mixture for long-term operation of muon chambers, which should survive high-rate radiation environment of the HERA-B experiment. I am now working on the commissioning analysis of data obtained from the muon system. This includes development of data analysis tools.

For my PhD in physics I work on the LHCb experiment. LHCb is a single-arm forward spectrometer dedicated to measure CP violation in the B meson system. It is one of the four future experiments at the LHC. For part of my time I have been working in the Outer Tracker group. The LHCb Outer Tracker consists of drift tubes using a fast drift gas. I have participated in prototype tests in a test beam, where I was responsible for the online DAQ software and the offline data analysis. I am also engaged in the general LHCb tracking software. We are currently developing pattern recognition algorithms for track reconstruction in LHCb. I also contributed to the development of the overall framework which was designed using object oriented principles. Furthermore I have performed monte carlo studies on the physics performance of LHCb on the decay of Bs mesons into a Ds and a pion or a Ds and a Kaon.

I am currently working on my Ph.D. at the DELPHI experiment at CERN. My analysis concerns The study of Final State Interactions in the production of W pairs, more specific the Bose-Einstein effect between pions coming from different W's and the Colour Reconnection effect. I'm currently trying to improve the sensitivity of our method to investigate Bose-Einstein correlations between pions coming from different W's, and trying to purify the sample of charged pion pairs we are investigating. I am also responsible for the daily monitoring of the Forward Muon Chambers of the DELPHI experiment. Next to that I am also taking part regularly in the central datataking shifts of the DELPHI experiment.

My current work is connected to CMS - one of the two general purposed detectors which will be put in operation at Large Hadron Collider. In my diploma thesis a simulation study of the matching of muon tracks embedded in bb-bar jets reconstructed in the muon stations and the inner tracker of the CMS detector have been performed. Now I keep working on this problem using a more sophisticated software and I hope to improve the achieved matching efficiency. As a member of the CMS collaboration I also work on investigation of the CMS potential for heavy Higgs searches in two Z- boson channel using the developed for CMS software - CMSIM.

My current work is connected with the NT-200 telescope optical modules. NT-200 is the deep underwater array of photomultipliers placed in the lake Baikal. Because of the particles flux direction is obtained from time information from the array of the cherenkov detectors, like in NT-200 telescope it is important to know the presision of the time measurement in the array, namely, precision of the timing with PMT. In other words the angular resolution of the telescope is defined by the timing precision. There are a lot of reasons which make worse the precision of the time measurement in the array detectors, e.g. geometry of the PMT cathode camera and dynode system, geometry of the array, electronics jitter, jitter from ion feedback, electron transition through the PMT, etc. And so for my PhD thesis I am performing measurements with the PMT timings and studying the influence above-mentioned processes in PMT on a precision of the timing, and therefore in the angular resolution of the array as a whole.

I am working as a PhD student at the ZEUS experiment located at the HERA accelerator (electron-positron collider) at DESY, Hamburg. The HERA collider will be upgraded this fall. The luminosity will be increased with a factor 5 and the experiments will improve their detectors. The ZEUS experiment will install a new vertex detector. This is a silicon strip detector with a strip pitch of 20 micron and a readout pitch of 120 micron. The read out will be done using the Helix 3.0 chip. My work involves the testing of the chips and the detectors in testbeam studies and in electrical tests making use of the internal test facility build into the chips. Currently I am working on a radiation program to optimise the performance of the detector during operation. I am also working on an analysis to measure the strange quark content of the proton.

For my PhD thesis I am searching for sleptons, the supersymmetric partners of the leptons, using the DELPHI detector on the LEP e+e- collider at CERN. In the absence of any deviation from Standard Model predictions, I have set mass limits on the sleptons by combining results from data taken in the 183 GeV to 202 GeV energy range. This search will be continued by using data collected this year. In the time that I have been working at CERN I have also contributed towards the successful operation of the Outer Detector in DELPHI and completed a number of quality checking shifts during the data taking period.

I am doing my Ph.D. thesis within the CMS collaboration. We are developing one of the multi-purpose detectors for the future Large Hadron Collider (LHC) at CERN. The first work I performed was about a method to better monitor the parton luminosities. This adds new constrains to the Parton Distribution Functions and allows a better control of the SM cross sections. Now I am working at the simulations of Vector Boson pair production. Particularly we are trying to improve the Higgs detection over different decay channels and for different Higgs masses. For this purpose we study Boson polarization effects, decay correlations due to V-A interactions as well as NLO effects on the kinematical distributions. From the hardware side we are testing crystals and APD's for the CMS ECAL. Particularly I studied the problem of the pion-electron mis-identification.