R-axion detection at LHC

TL;DR

This paper explores the potential for detecting the light R-axion particle predicted by supersymmetric models with broken R-symmetry at the LHC, focusing on displaced vertex signatures for masses around a few hundred MeV.

Contribution

It proposes a novel detection strategy for the R-axion at the LHC using displaced vertex searches for specific mass ranges.

Findings

R-axions with masses of a few hundred MeV can be detected at the LHC.

Displaced vertex signatures are promising indicators of R-axion presence.

Detection feasibility depends on the R-axion's properties and decay channels.

Abstract

Supersymmetric models with spontaneously broken approximate R-symmetry contain a light spin 0 particle, the R-axion. The properties of the particle can be a powerful probe of the structure of the new physics. In this paper, we discuss the possibilities of the R-axion detection at the LHC experiments. It is challenge to observe this light particle in the LHC environment. However, for typical values in which the mass of the R-axion is a few hundred MeV, we show that those particles can be detected by searching for displaced vertices from R-axion decay.