Speaker
Alexander Korzenev
(Universite de Geneve (CH))
Description
A precise prediction of the expected neutrino flux is required for a long-baseline accelerator neutrino experiment. The flux is used to measure neutrino cross sections at the near detector, while at the far detector it provides an estimate of the expected signal for the study of neutrino oscillations. Review of recent results of the NA61/SHINE experiment on determination of charged hadron yields in proton-carbon interactions is presented. Values of differential cross sections of $\pi^\pm$, K$^\pm$, p, K$^0_s$ and $\Lambda$ provided by NA61/SHINE are presently used in the T2K $\nu$ beam simulation program to reweight hadron yields. They allowed to reduce the flux uncertainty at the neutrino peak energy down to 9%. At the same time, NA61/SHINE results obtained with the T2K replica target, which are used to constrain hadron yields at the surface of the target, will reduce significantly a model dependence of the neutrino beam prediction. Prospects of further improvement of precision of NA61/SHINE measurements in view of the forthcoming runs for energies of the main injector neutrino beamline at FNAL are reviewed.
additional information
on behalf of the NA61/SHINE collaboration
Author
Alexander Korzenev
(Universite de Geneve (CH))
