Decoherence, matter effect, and neutrino hierarchy signature in long baseline experiments

João A.B. Coelho (1) , W. Anthony Mann

1 APC (UMR_7164) - AstroParticule et Cosmologie

Environmental decoherence of oscillating neutrinos of strength Γ=(2.3±1.1)×10-23  GeV can explain how maximal θ23 mixing observed at 295 km by T2K appears to be nonmaximal at longer baselines. As shown recently by R. Oliveira, the Mikheyev-Smirnov-Wolfenstein matter effect for neutrinos is altered by decoherence: in normal (inverted) mass hierarchy, a resonant enhancement of νμ(ν¯μ)→νe(ν¯e) occurs for 6

Mots clés: matter: effect; MSW effect; neutrino: oscillation; neutrino: mass; neutrino: mass: hierarchy; neutrino: mixing; neutrino: mixing angle; resonance: enhancement; decoherence; charged current; J-PARC Lab; KAMIOKANDE; OPERA; MINOS; numerical calculations; new physics

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]

João A.B. Coelho, W. Anthony Mann. Decoherence, matter effect, and neutrino hierarchy signature in long baseline experiments. Physical Review D, 2017, 96 (9), pp.093009. ⟨10.1103/PhysRevD.96.093009⟩. ⟨hal-01669759⟩