Probing New Limits for the Violation of the Equivalence Principle in the solar-reactor neutrino sector as a next to leading order effect

TL;DR

This paper establishes new, stringent limits on the violation of the Equivalence Principle in the neutrino sector by analyzing solar and reactor neutrino data, suggesting such violations are smaller than previously constrained.

Contribution

It provides the first limits on VEP effects in neutrinos considering mass-flavor mixing and gravitational potential influences from the Great Attractor.

Findings

Limit for VEP parameter ||<10^{-14}

Analysis includes solar and reactor neutrino observations

Assumes gravitational potential    due to the Great Attractor

Abstract

New limits for the Violation of Equivalence Principle (VEP) are obtained considering the mass-flavor mixing hypothesis. This analysis includes observations of solar and reactor neutrinos and has obtained a limit for the VEP parameter $|\Delta \gamma|$ contributing to the $\nu_e$ and $\bar{\nu}_e$ disappearance channels of the order $|\Delta \gamma|<10^{-14}$, when it is assumed that neutrinos are mainly affected by the gravitational potential $\varphi\approx 10^{-5}$ due to the Great Attractor.