Speaker
Description
A deep understanding of neutrino-target interactions is crucial to reduce the systematic uncertainties for oscillation parameter measurements. We investigate the effect of final-state interactions (FSI) in the charge current quasi-elastic (CCQE) channel by reconstructing the neutrino energy using the calorimetric method. A selection of events with 1 proton, 0 pion, and any number of neutrons in the final state reduces the discrepancy between reconstructed and true neutrino energy for the CCQE process analyzed for DUNE and MicroBooNE using Monte-Carlo simulations. Since the reconstruction of neutrino energy is important for improving cross-section measurements, the Kaon-Decays-At-Rest (KDAR) neutrinos provide an opportunity to study the neutrino interactions in the low-energy regime with a known neutrino energy of 235.5 MeV. We explore the missing energy in KDAR νμ CC scattering on Carbon in JSNS2 using MC generators. In addition to FSI, the initial state of nucleon also affects the cross-section measurements. We study the reconstruction of the Fermi motion of the target nucleon in MC generators using the MINERvA π0 measurement. The MC predictions describe the data more accurately in the higher momentum tail however, discrepancies with data below the Fermi peak highlight the limitations in current models used in the Monte Carlo generators. Moreover, a thorough understanding of resonance states and their properties is required for the measurements of RES cross-section. We also analyse the contribution of the second resonance region to the total neutrino-Argon cross-section in the DUNE near detector.
