Supersymmetry with a Chargino NLSP and Gravitino LSP
Abstract
We demonstrate that the lightest chargino can be lighter than the lightest neutralino in supersymmetric models with Dirac gaugino masses as well as within a curious parameter region of the MSSM. Given also a light gravitino, such as from low scale supersymmetry breaking, this mass hierarchy leads to an unusual signal where every superpartner cascades down to a chargino that decays into an on-shell W and a gravitino, possibly with a macroscopic chargino track. We clearly identify the region of parameters where this signal can occur. We find it is generic in the context of the R-symmetric supersymmetric standard model, whereas it essentially only occurs in the MSSM when sign(M1) is not equal to sign(M2) = sign(\mu) and tan(beta) is small. We briefly comment on the search strategies for this signal at the LHC.
Keywords
Cite
@article{arxiv.0807.4936,
title = {Supersymmetry with a Chargino NLSP and Gravitino LSP},
author = {Graham D. Kribs and Adam Martin and Tuhin S. Roy},
journal= {arXiv preprint arXiv:0807.4936},
year = {2009}
}
Comments
27 pages and 16 figures