NA61 for T2K: predicting neutrino fluxes from auxiliary hadron production experiments -- N. Abgrall (CERN)

jeudi 4 nov. 2010, 14:00 → 15:00 Europe/Paris

1222-SB-08 (LPNHE)

As neutrino long baseline experiments enter a new domain of precision, important systematic errors due to poor knowledge of production cross-sections for pions and kaons require more measurements. Among other goals, the NA61-SHINE (SPS Heavy Ion and Neutrino Experiment) experiment at the CERN SPS aims at precision measurements (5% and below) for neutrino experiments: those will improve the prediction of the neutrino fluxes for the T2K (Tokai to Kamioka) experiment at J-PARC. NA61-SHINE took data during a pilot run in 2007 and in 2009-2010 with different Carbon targets including a "replica" of the T2K target (1.9 interaction length). Preliminary spectra for positive and negative pions have been obtained with the 2007 thin (4% interaction length) Carbon target data and already used by the T2K beam group. The T2K and NA61 experiments are briefly presented. Then we go through different aspects of the neutrino flux prediction based for the first time on measurements from a long target.