Abstract
Nonstandard interactions (NSIs), possible subleading effects originating from new physics beyond the Standard Model, may affect the propagation of neutrinos and eventually contribute to measurements of neutrino oscillations. Besides this, $ \mu-\tau $ reflection symmetry, naturally predicted by non-Abelian discrete flavor symmetries, has been very successful in explaining the observed leptonic mixing patterns. In this work, we study the combined effect of both. We present an $S_4$ flavor model with $\mu-\tau$ reflection symmetry realized in both neutrino masses and NSIs. Under this formalism, we perform a detailed study for the upcoming neutrino experiments DUNE and T2HK. Our simulation results show that under the $\mu-\tau $ reflection symmetry, NSI parameters are further constrained and the mass ordering sensitivity is less affected by the presence of NSIs.
Highlights
We present an S4 flavor model with μ − τ reflection symmetry realized in both neutrino masses and Nonstandard interactions (NSIs)
The observation of neutrino oscillations by various experiments using solar, atmospheric, reactor, and accelerator neutrinos indubitably established the existence of neutrino mass, which provides a clear evidence of new physics beyond the Standard Model (SM) [1]
Since we assume that the μ − τ reflection symmetry is a residual symmetry in the neutrino sector, vacuum expectation values (VEVs) of ξ, ζ, and χ should be invariant under the relevant transformation, namely, 095036-3
Summary
The observation of neutrino oscillations by various experiments using solar, atmospheric, reactor, and accelerator neutrinos indubitably established the existence of neutrino mass, which provides a clear evidence of new physics beyond the Standard Model (SM) [1]. The next-generation long baseline (LBL) accelerator neutrino oscillation experiments, DUNE [21] and T2HK [22], aim to do precision tests for the standard three-flavor neutrino oscillation parameters Because of their statistically high potential, they will reach the sensitivity to probe NSIs. In recent times, there have been many interesting studies involving NSIs and their impacts on the measurement of standard neutrino oscillation parameters; for detailed reviews, see Refs. We make an attempt to study the importance of NSIs for the upcoming LBL neutrino oscillation experiments DUNE and T2HK in the presence of μ − τ reflection symmetry.
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