Exploring Supersymmetric Model with Very Light Gravitino at the LHC

Abstract

The low-scale gauge mediation scenario of supersymmetry breaking predicts very light gravitino, which makes the next lightest supersymmetric particle (NLSP) quasi stable. We study the LHC phenomenology of the case that the NLSP is the stau. When the mass of the gravitino is of the order of 10eV, the decay length of stau is about 0.1--1 mm, so that it decays before reaching the first layer of the inner silicon detector. We show, however, that, with utilizing the impact parameter of tau-jets from the stau decay, it is possible to determine the mass spectrum of sparticles precisely. It is also possible to estimate the lifetime of the stau by observing distribution of the impact parameter.

20 pages, 6 figures, 2 tables

References in corpus (3)

• Test of Anomaly Mediation at the LHC
• Long-Lived Unstable Superparticles at the LHC
• Studying Very Light Gravitino at the ILC

Cited by in corpus (5)

• Natural SUSY's Last Hope: R-parity Violation via UDD Operators
• Exploring Non-Holomorphic Soft Terms in the Framework of Gauge Mediated Supersymmetry Breaking
• Soft RPV Through the Baryon Portal
• A New Scheme for NMSSM in Gauge Mediation
• Discriminating Minimal SUGRA and Minimal Gauge Mediation Models at the Early LHC