Improving LMA predictions with non-standard interactions: neutrino decay in solar matter?

Abstract

It has been known for some time that the well established LMA solution to the observed solar neutrino deficit fails to predict a flat energy spectrum for SuperKamiokande as opposed to what the data indicates. It also leads to a Chlorine rate which appears to be too high as compared to the data. We investigate the possible solution to these inconsistencies with non standard neutrino interactions, assuming that they come as extra contributions to the ${\nu }_{\alpha }{\nu }_{\beta }$ and ${\nu }_{\alpha }e$ vertices that affect both the propagation of neutrinos in the sun and their detection. We find that, among the many possibilities for non standard couplings, only the diagonal imaginary ones lead to a solution to the tension between the LMA predictions and the data, implying neutrino instability in the solar matter. Unitarity requirements further restrict the solution and a neutrino decay into an antineutrino and a majoron within the sun is the one favoured. Antineutrino probability is however too small to open the possibility of experimentally observing antineutrinos from the sun due to NSI.

27 pages, 8 figures. Final version to be published in Physical Review D

References in corpus (16)

• Solar neutrino measurements in Super-Kamiokande-II
• Non-Standard Neutrino Interactions with Matter from Physics Beyond the Standard Model
• General bounds on non-standard neutrino interactions
• Charged Spinning Black Holes as Particle Accelerators
• Large gauge invariant non-standard neutrino interactions
• Revising Limits on Neutrino-Majoron Couplings
• Leptoquarks: Neutrino masses and accelerator phenomenology
• Study of solar and other unknown anti-neutrino fluxes with Borexino at LNGS
• Probing non-standard neutrino interactions with supernova neutrinos
• Effects of non-standard neutrino-electron interactions on relic neutrino decoupling
• Loop bounds on non-standard neutrino interactions
• Non-Standard Neutrino Interactions from a Triplet Seesaw Model
• Solar neutrinos and the solar composition problem
• Neutrino Masses and A TeV Scale Seesaw Mechanism
• Light sterile neutrinos, spin flavour precession and the solar neutrino experiments
• Radiochemical solar neutrino experiments

Cited by in corpus (12)

• Status of non-standard neutrino interactions
• Constraints on neutrino decay lifetime using long-baseline charged and neutral current data
• Visible neutrino decay in the light of appearance and disappearance long baseline experiments
• Revisiting quantum decoherence for neutrino oscillations in constant matter density
• Matter effects in neutrino visible decay at future long-baseline experiments
• Testing quantum decoherence at DUNE
• Constraining visible neutrino decay at KamLAND and JUNO
• Probing muonic charged current nonstandard interactions at decay-at-rest facilities in conjunction with T2HK
• Neutrino nonstandard interactions in the supernova
• Possible trace of neutrino nonstandard interactions in the supernova
• NSI can improve LMA predictions: neutrino decay in solar matter?
• Long baseline neutrino experiments, mass hierarchy and delta(CP)