A Clean Slepton Mixing Signal at the LHC

TL;DR

This paper proposes a method to detect flavor mixing in scalar tau leptons at the LHC, demonstrating sensitivity to mixing angles of sin(theta)=0.15 with 100fb^{-1} luminosity, surpassing some experimental bounds.

Contribution

It introduces a novel search strategy for scalar tau flavor mixing at the LHC, showing potential sensitivity improvements over existing bounds.

Findings

Sensitivity to mixing angle sin(theta)=0.15 with 100fb^{-1}

Detection possible if supersymmetric production cross section is around 1pb

Potential to surpass bounds from tau --> mu + gamma decay

Abstract

In supersymmetric scenarios where the scalar tau lepton is stable or long-lived, a search for a decay mode chi0 --> stau + mu at the LHC has a good sensitivity to the flavor mixing in the scalar lepton sector. We demonstrate that the sensitivities to the mixing angle at the level of sin(theta)=0.15 are possible with an integrated luminosity of 100fb^{-1} if the total production cross section of supersymmetric particles is of the order of 1pb. The sensitivity to the mixing parameter can be better than the experimental bound from the tau --> mu + gamma decay depending on model parameters.