Determining Spins of Metastable Sleptons at the Large Hadron Collider

TL;DR

This paper analyzes the luminosity needed at the LHC to determine the spin of metastable sleptons in supersymmetric models, demonstrating feasibility with realistic data volumes and aiding in distinguishing new physics scenarios.

Contribution

It provides a method to estimate the LHC luminosity required for slepton spin determination in metastable scenarios, applying it to benchmark models and generalizing to other cases.

Findings

Slepton spin can be determined with less than 30 fb$^{-1}$ in one benchmark.

Another benchmark requires about 40 fb$^{-1}$ for spin determination.

The analysis helps distinguish supersymmetry from extra dimensions.

Abstract

We investigate models in minimal supergravity parameter space which contain metastable sleptons. We find the luminosity required to determine the slepton spin in these scenarios, and apply our analysis to two benchmark models. We show that the spin of the slepton in one of the benchmark models can be determined with less than 30 fb$^{-1}$ of data, while the slepton spin in the other model can be determined with roughly 40 fb$^{-1}$ of data. We show how our analysis can be applied to other models, and give an estimate of the luminosity needed for a spin determination as a function of slepton mass. This analysis can be used to distinguish supersymmetry and extra dimensions.