Neutrino Lorentz invariance violation and ultralight axion-like dark matter searches at the European Spallation Source

TL;DR

This paper explores how ultralight axion-like particles could cause Lorentz and CPT violations in neutrino oscillations, proposing that future experiments at the European Spallation Source could detect such effects, advancing dark matter research.

Contribution

It introduces a novel approach to search for ultralight axion-like dark matter via neutrino oscillation experiments, focusing on Lorentz and CPT violation signatures.

Findings

Sensitivity estimates for detecting Lorentz and CPT violations at ESS.

Constraints on neutrino-axion couplings and SME coefficients.

Potential to improve dark matter detection methods.

Abstract

The dark matter conundrum stands out as one of the central challenges to understand in both particle physics and cosmology. The ultralight axion-like particle (UALP) is an appealing dark matter candidate that can be searched for in neutrino oscillation experiments. In this work, we examine the interaction among neutrinos and a UALP; such interaction might induce violations of the Lorentz and $CPT$ symmetries. We assess the sensitivity to both the isotropic $CPT-$odd Standard Model Extension (SME) coefficients $(a_L)^T$ and effective neutrino-UALP couplings $\tilde{g}$ at the next-to-next generation neutrino oscillation experiment at the European Spallation Source (ESS).