Speaker
Dr
Glenn Lopez
(Stony Brook University (US))
Description
One of the main physics goal of the T2K experiment is the measurement of the angle theta_13 in the neutrino mixing matrix. This is done through the observation of nu_e appearance in the nu_mu neutrino beam. The main background to this measurement is the intrinsic nu_e beam component that has to be measured before the oscillation at the T2K Near Detector (ND280). We performed two analyses to at ND280 to measure this component, using the data collected during the first two T2K physics runs. One analysis uses the pi0 detector (P0D) to select high energy electrons measuring in this way the high energy part of the nu_e contamination in the T2K beam mainly coming from the Kaon component.The other analysis selects neutrino interactions in the Fine Grained Detector (FGD) of ND280 and distinguish electrons from muons combining the PID capabilities of three Time Projection Chambers (TPC) and an Electromagnetic Calorimeter (ECAL). The results of these two measurements provide confidence in the understanding of the intrinsic nu_e beam component of the T2K beam simulation and in the T2K nu_e appearance results.
Author
Dr
Glenn Lopez
(Stony Brook University (US))
