A plethora of long-range neutrino interactions probed by DUNE and T2HK

TL;DR

Future neutrino experiments DUNE and T2HK can significantly constrain or potentially discover new long-range flavor-dependent neutrino interactions mediated by ultra-light bosons, revealing possible new symmetries beyond the Standard Model.

Contribution

This study forecasts the sensitivity of DUNE and T2HK to a wide range of long-range neutrino interactions from various $U(1)^\

Findings

DUNE and T2HK can constrain or discover new neutrino interactions.

They can potentially identify the specific $U(1)^\

New interactions could be mediated by ultra-light bosons lighter than $10^{-10}$ eV.

Abstract

The next-generation neutrino oscillation experiments would be sensitive to the new neutrino interactions that would strengthen the search for physics beyond the Standard Model. In this context, we explore the capabilities of the two leading future long-baseline neutrino oscillation experiments, DUNE and T2HK, to search for new flavor-dependent neutrino interactions with electrons, protons, and neutrons that could potentially modify neutrino flavor transitions. We forecast their sensitivities in the context of long-range neutrino interactions mediated by a neutral vector boson lighter than $10^{-10}$ eV and sourced by the vast amount of nearby and distant matter in the Earth, Moon, Sun, Milky Way, and local Universe. For the first time, we explore a plethora of $U(1)^\prime$ symmetries inducing the new interactions built from the combination of lepton and baryon numbers. We find that in all cases, DUNE and T2HK may constrain or discover the existence of new long-range neutrino interaction, and in some favorable cases, may identify the new $U(1)^\prime$ symmetry responsible for it. In this short proceeding, we only summarize the prospects of constraining the new interaction in case of all our candidate $U(1)^\prime$ symmetries, which have been discussed in JHEP 09 (2024) 055.