Tests of Lorentz and CPT Violation in the Medium Baseline Reactor Antineutrino Experiment

TL;DR

This paper investigates potential violations of Lorentz and CPT symmetry using reactor antineutrino data, demonstrating that the JUNO experiment could significantly improve existing limits on these violations.

Contribution

It introduces a method to test Lorentz and CPT violation in reactor antineutrino experiments within the SME framework, showing JUNO's enhanced sensitivity.

Findings

JUNO can improve sensitivity to Lorentz violation coefficients by over two orders of magnitude.

Spectral distortion and sidereal variation are effective probes for Lorentz and CPT violation.

The analysis sets new, tighter limits on Lorentz violation coefficients.

Abstract

Tests of Lorentz and CPT violation in the medium baseline reactor antineutrino experiment are presented in the framework of the Standard Model Extension (SME). Both the spectral distortion and sidereal variation are employed to derive the limits of Lorentz violation (LV) coefficients. We do the numerical analysis of the sensitivity of LV coefficients by taking the Jiangmen Underground Neutrino Observatory (JUNO) as an illustration, which can improve the sensitivity by more than two orders of magnitude compared with the current limits from reactor antineutrino experiments.