Electron neutrino tagging through tertiary lepton detection

Details Electron neutrino tagging through tertiary lepton detection Electron neutrino tagging through tertiary lepton detection

2010-04-16

arxiv.org/abs/1004.2904v2

Physics

High Energy Physics

High Energy Physics - Experiment

19 pages, 7 figures; minor changes, version to appear in EPJC

Scientific paper

We discuss an experimental technique aimed at tagging electron neutrinos in multi-GeV artificial sources on an event-by-event basis. It exploits in a novel manner calorimetric and tracking technologies developed in the framework of the LHC experiments and of rare kaon decay searches. The setup is suited for slow-extraction, moderate power beams and it is based on an instrumented decay tunnel equipped with tagging units that intercept secondary and tertiary leptons from the bulk of undecayed \pi^+ and protons. We show that the taggers are able to reduce the \nue contamination originating from K_e3 decays by about one order of magnitude. Only a limited suppression (~60%) is achieved for \nue produced by the decay-in-flight of muons; for low beam powers, similar performance as for K_e3 can be reached supplementing the tagging system with an instrumented beam dump.

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