Measurement of the Superparticle Mass Spectrum in the Long-Lived Stau Scenario at the LHC

TL;DR

This paper explores how the LHC can precisely measure superparticle masses in long-lived stau scenarios, especially when mass differences are sizable, improving our understanding of supersymmetric particle spectra.

Contribution

It presents a method for accurate mass measurements of neutralinos, sleptons, and squarks in long-lived stau scenarios with detectable decay products.

Findings

Masses of neutralinos, sleptons, and squarks can be measured accurately.

Detectable decay products enable precise mass determination.

Long-lived stau scenarios are promising for supersymmetry studies.

Abstract

In supersymmetric scenarios with a long-lived stau, the LHC experiments provide us with a great environment for precise mass measurements of superparticles. We study a case in which the mass differences between the lightest stau and other sleptons are about 10 GeV or larger, so that the decay products of heavier sleptons are hard enough to be detected. We demonstrate that the masses of neutralinos, sleptons, and squarks can be measured with a good accuracy.