Muonic Force and Neutrino Non-Standard Interactions at Muon Colliders

TL;DR

This paper explores how high-energy muon colliders can detect non-standard neutrino interactions involving muons, using monophoton signals to probe new physics beyond the Standard Model.

Contribution

It introduces a detailed analysis of muonic forces and non-standard neutrino interactions at muon colliders, including phenomenology and sensitivity projections.

Findings

Projected sensitivities for NSI parameters at 3 TeV collider

Analysis of monophoton signals for detecting NSIs

Comparison with other experimental probes

Abstract

The discovery of neutrino oscillations implies that neutrinos are massive and mixed, necessitating an extension of the Standard Model, which may require the introduction of non-standard neutrino interactions (NSI). We investigate the potential of a high-energy muon collider to probe such NSIs with muons, specifically focusing on muonic forces. By analyzing the monophoton signal from the process $\mu^+ \mu^- \rightarrow \nu \overline{\nu } \gamma$, we explore four-fermion contact interactions involving two muons and two neutrinos. Moreover, we examine minimal models that generate scalar and vector-mediated NSIs and study their phenomenology. Projected sensitivities for the strength of NSIs, $\epsilon_{\alpha \beta}^{\mu \mu}$, are presented at a 95$\%$ confidence level for a center-of-mass energy of 3 TeV and integrated luminosities of $\mathcal{L} = 1$ and $10~\mathrm{ab}^{-1}$, showcasing the complementarity between a muon collider and other experimental probes.