For my PhD thesis I'm working on the research of Ultra High Energy Cosmic Rays (UHCR) in the International Collaboration Pierre Auger. The Pierre Auger Observatory consist on 1600 cherenkov detectors and four fluorescence telescopes which detects the particles showers produced by the interaction of a UHECR with the atmosphere. Iíve performed analysis of their arrival direction and the expected background for the lower energies(~1 EeV). As a part of this work I study the acceptance of the detector and their dependence with weather and trigger conditions. I develop a method to measure one of the critical cherenkov detector parameter as is the water volume by a study of the background muon flux in a remote mode.

I have some experience in the analysis of electron-proton collisions with the H1 detector at HERA. In my analysis the cross section for charm production in deep inelastic scattering was measured. The semileptonic decay of the quark charm into an electron and a neutrino was the basis of the studies. Thus, events were selected where a secondary electron in addition to the scattered electron was tagged. The statistics were greatly benefited by the large branching ratio of the semileptonic decay. The measurements were found in good agreement with previous analyses based on D*-mesons decays.
Presently, I am engaged in the study of the saturation model for the description of virtual photon-proton scattering. My aim is to describe the cross section as a function of a single variable (instead of the usual two variables x and Q2) at the regime of x>0.01. With these new studies I expect to accomplish my Ph.D.

I am working in my Master's thesis on the Instituto de Fisica de la UNAM in Mexico, in particular in the 'Pyramid of Teotihuacan' experiment wich consists of a set up of multiwirechambers and scintillators. This setup is design to infer internal structure of the pyramid by the scattering and absorbtion of atmospheric muons. On the other hand in my thesis I will explore the possibility of use this big amount of data (10 up to 8 muon events per year) in order to obtain information from the primaries cosmic particles. In this frame I am working wiht CORSIKA and GEANT4 software for simulations involving directional data.

I am currently working on the NA48 experiment. It is located in the North Area of the SPS proton accelerator at CERN and was devoted to the measurement of direct CP violation in neutral kaons, decay probabilities of rare KS- and Hyperon-decays and to the measurement of CP violation and rare decays of charged kaons. Since 2002 I have been responsible for both hardware and software of both the hadron calorimeter and the beam counter. For my PhD thesis I am measuring the decay probability of K+/- to pi+/- gamma gamma in order to determine high order Chiral Pertubation Theory corrections.

For my Master thesis, I have been working with the Auger group from La Plata, Argentina under the supervision of Prof. Dova. I have worked in the analysis of extensive air showers with energies above 1019 eV towards the determination of primary composition. The analysis was carried out using Monte Carlo generated showers. These data was also simulated with the standard detector response of the surface array of the Pierre Auger Observatory. The ground array is extremaly rich as we can measure several observable sensitive to the position of the maximum development of the shower in the atmosphere (Xmax), wich is strongly correlated with the nature of the primary particle.
One of the main variables being the rise-time of the signals detected in the Water Cerenkov Detector. In particular, I have been working on the dependence of the rise-time with the distancee to the shower core and zenith angle of the shower.

I am currently involved in some aspects related to neutrino physics, leptogenesis and the finite temperature behaviour of extended models of the standard model.