A non-conventional neutrino beamline for the measurement of the electron neutrino cross section

الأصل · EN

Absolute neutrino cross section measurements at the GeV scale are ultimately limited by the knowledge of the initial ν flux. In order to evade such limitation and reach the accuracy that is needed for precision oscillation physics (1%), substantial advances in flux measurement techniques are requested. We discuss here the possibility of instrumenting the decay tunnel to identify large-angle positrons and monitor νₑ production from K+ → e+ νₑ π⁰ decays. This non conventional technique opens up opportunities to measure the νₑ CC cross section at the per cent level in the energy range of interest for DUNE/HK. We discuss the progress in the simulation of the facility (beamline and instrumentation) and the ongoing R&D.