Nonstandard interactions in neutrino oscillations and the recent Daya Bay and T2K experiments

2012/01/31 by Rathin Adhikari, Sabyasachi Chakraborty, Arnab Dasgupta +2 · 24 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #CP violation #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Oscillation (cell signaling) #Particle physics #Particle physics theoretical and experimental studies #Physics #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.86.073010

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 86(7) (American Physical Society) · 13 pages, RevTex4, 6 figures (12 eps files) Significant changes after incorporating Daya Bay result

arxiv created 2012/08/30 · openalex publication_date 2012/10/17 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We study the possible constraints on nonstandard interaction (NSIs) in a model-independent way by considering the recent results from the T2K and Daya Bay neutrino oscillations experiments. Using the perturbation method we present generic formulas (suitable for T2K baseline and for large \ensuremathθ₁₃ as evident from Daya Bay) for the probability of oscillation for \ensuremathν_\ensuremathμ\ensuremath→\ensuremathν_e, taking into account NSIs at the source (ϵ^s), the detector (ϵ^d), and during propagation (ϵ^m) of neutrinos through matter. Two separate cases of perturbation with small (slightly large) NSI [ϵ_\ensuremathα\ensuremathβ^m\ensuremath∼0.03(0.18)] are discussed in detail. Using various possible presently allowed NSI values we reanalyze numerically the \ensuremathθ₁₃\ensuremath-\ensuremathδ allowed region given by recent T2K experimental data. We obtain model-independent constraints on NSIs in the \ensuremathδ\ensuremath-ϵ_\ensuremathα\ensuremathβ^m plane using the \ensuremathθ₁₃ value as measured by Daya Bay, where \ensuremathδ is the CP violating phase. Depending on \ensuremathδ values, significant constraints on ϵ_e\ensuremathτ and ϵ_\ensuremathτ\ensuremathτ, in particular, are possible for both hierarchies of neutrino masses. Corresponding to T2K's 66% confidence level result, the constraints on ϵ_\ensuremathτ\ensuremathτ are shown to be independent of any \ensuremathδ value.

Citations

• Non-standard neutrino interactions and neutrino oscillation experiments
• Present and future bounds on non-standard neutrino interactions
• Effects of non-standard neutrino–electron interactions on relic neutrino decoupling
• Remarks on the Unified Model of Elementary Particles
• Atmospheric neutrino oscillations and new physics
• General bounds on non-standard neutrino interactions
• On non-unitary lepton mixing and neutrino mass observables
• CP violation in neutrino oscillations and new physics
• Lorentz andCPTviolation in neutrinos
• Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam
• Probing nonstandard neutrino interactions with supernova neutrinos
• NewCPviolation in neutrino oscillations
• Test of tau neutrino interactions with atmospheric neutrinos and K2K data
• Two modes of searching for new neutrino interactions at MINOS

Cited by

• Shifts of neutrino oscillation parameters in reactor antineutrino experiments with non-standard interactions