Tagged electron neutrinos
Francesco Terranova, A. Longhin, L. Ludovici · 2015
The advantages of identifying charged leptons in the decay tunnel of conventional neutrino beams are known since long but the technologies that can sustain the corresponding rates and doses became available only recently. We revise these technologies demostrating that a very precise monitoring of n e at source can be achieved tagging the positrons in K + ! e + p 0 n e decays. We discuss facilities where positron monitoring is employed to reduce the uncertainties on the n e flux and improve substantially our knowledge of cross sections (“single tag mode”). We also consider more ambitious setups where the time correlation between lepton and n CC event at the far detector is exploited (“event by event tag mode”)