Speaker
Description
The ForwArd Search ExpeRiment is an experiment located at CERN on the LHC downstream of the ATLAS detector. FASER is positioned behind 480 meters of rock and cement and collision line of sight axis, making it well suited for detecting feebly interacting neutral particles in the forward region such as the neutrino. FASER has published several results measuring the neutrino Charged-Current (CC) interactions, but has yet to make a measurement of electron neutrino CC interaction using the electronic spectrometer. This poster presents the results of FASER electron neutrino analysis using the electronic detectors with 176.8 fb-1 of data, corresponding to the 2022, 2023, and 2024 periods. This analysis looks for electromagnetic (EM) energy deposits in the EM calorimeter from electron neutrino CC interactions in different regions of the detector, including the tracking magnets, the preshower radiators, and the EM calorimeter itself. Each region is analyzed independently before statistically combined for the final results. The dominant background for this analysis are muon neutrino CC interactions. This is estimated for each region using FASER’s previous electronic measurements of muon neutrino CC interactions. This result demonstrates the unique capability of FASER to study electron neutrino interactions, and establish a foundation for future high-precision measurements at high energies.