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29 March 2024
 
  » arxiv » hep-ph/0311254

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Resonant slepton production at the LHC in models with an ultralight gravitino
B.C. Allanach ; Manoranjan Guchait ; K. Sridhar ;
Date 20 Nov 2003
Journal Phys.Lett. B586 (2004) 373-381 DOI: 10.1016/j.physletb.2004.02.049
Subject hep-ph hep-ex
AbstractWe examine resonant slepton production at the LHC with gravitinos in the final state. The slepton undergoes gauge decay into a neutralino and a lepton, the neutralino decays into a photon and a gravitino. By measuring the transverse masses of the gamma- G and the l-gamma- G subsystems it is possible to accurately reconstruct both the slepton and neutralino masses. In some regions of parameter space the slepton decays directly into a lepton and gravitino, giving an identical experimental topology to W production (l missing E_T). We present the novel matrix element squared for lepton-gravitino production. A peak in the tail of the lepton-missing momentum transverse mass distribution of the W provides a signature for the process and an accurate measurement of the slepton mass. We display the search reach for the LHC and 300 fb^{-1} of integrated luminosity.
Source arXiv, hep-ph/0311254
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