Alfonso Garcia: New inputs for T2K oscillation measurements

Wednesday 8 Jun 2016, 13:00 → 14:00 Europe/Madrid

Seminar (IFAE)

Jelena Aleksic (IFAE), Joern Lange (IFAE Barcelona), John E Ward (IFAE)

T2K is a long-baseline neutrino experiment whose main purpose is to measure neutrino oscillations. In June 2011, it announced the first experimental indications for oscillations for muon to electron neutrinos. It also has the measurement world best measurement for muon neutrino disappearance. As collected data increases, systematics uncertainties becomes dominant. Near detector (ND280) plays a key role because it is able to constraint both cross section and flux uncertainties. Those uncertainties are controlled using the kinematical properties of the muon coming out from a charge current interaction. Currently, ND280 uses forward going muons while the far detector has a 4pi acceptance. I have developed a new selection for ND280 which increases the acceptance in the backward region. This improvement will allow to contrain better systematics uncertainties for future oscillation results. In this talk, I will show the status of this new selection.