Constraints on the non-standard interaction in propagation from atmospheric neutrinos

2015/03/27 by Fukasawa, Shinya, Yasuda, Osamu · 1 citation
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1503.08056

Abstract

The sensitivity of the atmospheric neutrino experiments to the non-standard flavor-dependent interaction in neutrino propagation is studied under the assumption that the only nonvanishing components of the non-standard matter effect are the electron and tau neutrino components ε_ee, ε_eτ, ε_ττ and that the tau-tau component satisfies the constraint ε_ττ=|ε_eτ|²/(1+ε_ee) which is suggested from the high energy behavior for atmospheric neutrino data. It is shown that the Superkamiokande (SK) data for 4438 days constrains |tanβ|≡|ε_eτ/(1+ε_ee)|\lesssim 0.8 at 2.5σ (98.8%) CL whereas the future Hyperkamiokande experiment for the same period of time as SK will constrain as |tanβ|\lesssim 0.3 at 2.5σCL from the energy rate analysis and the energy spectrum analysis will give even tighter bounds on ε_ee and |ε_eτ|.

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