Stau Kinks at the LHC

TL;DR

This paper investigates the potential to detect kink signatures of charged tracks at the LHC in various SUSY models, highlighting the discovery prospects and methods for model discrimination based on decay signatures.

Contribution

It provides a detailed analysis of the kink signature at LHC for SUSY models with stau NLSP and gravitino LSP, including discovery potential and model discrimination strategies.

Findings

Large number of kink events detectable within certain decay length range

Kink signatures can be used to distinguish between different SUSY models

Decay length of order 10-10^5 mm is optimal for detection

Abstract

The kink signature of charged tracks is predicted in some SUSY models, and it is very characteristic signal at collider experiments. We study the kink signature at LHC using two models, SUSY models with a gravitino LSP and a stau NLSP, and R-parity violating SUSY models with a stau (N)LSP. We find that a large number of kink events can be discovered in a wide range of the SUSY parameters, when the decay length is O(10-10^5)mm. Model discrimination by identifying the daughter particles of the kink tracks is also discussed.