Atmospheric neutrino constraints on Lorentz invariance violation with the first six detection units of KM3NeT/ORCA

TL;DR

This study uses atmospheric neutrino data from the initial six detection units of KM3NeT/ORCA to test Lorentz invariance, setting new limits on possible violations and thus probing physics beyond the Standard Model.

Contribution

It provides the first constraints on Lorentz invariance violation using atmospheric neutrinos with the KM3NeT/ORCA detector configuration.

Findings

No evidence of Lorentz invariance violation was observed.

Established competitive limits on isotropic Lorentz invariance violating coefficients.

Results extend existing experimental constraints.

Abstract

Lorentz invariance is a fundamental symmetry underlying both the Standard Model of particle physics and General Relativity. Testing its validity provides a direct means of searching for new physics emerging near the Planck scale. A search for isotropic Lorentz invariance violation with 1.4 years of atmospheric neutrino data collected by a partial configuration of the KM3NeT/ORCA detector comprising six detection units is presented. No evidence for such violation is found; thus, competitive limits are set on a subset of isotropic Lorentz invariance violating coefficients, which complement and extend existing experimental constraints.