title: Long-Lived Gluinos and Stable Axinos.
abstract: In this Letter we present a novel version of "long-lived" gluinos in supersymmetric models with the gluino lightest ordinary supersymmetric particle (LOSP) and the axino lightest supersymmetric particle. Within certain ranges of the axion decay constant f_{a}<1×10^{10}  GeV, the gluino mass bounds are reduced to less than 1000 GeV. The best limits can be obtained by looking for decaying R hadrons in the detector where the gluino decays to a gluon and axino in the calorimeters. Supersymmetry (SUSY) models with a gluino LOSP can occur over a significant region of parameter space in either mirage mediation or general gauge-mediated SUSY breaking models. The gluino LOSP is not constrained by cosmology, but in this scenario the axion or axino may be a good dark matter candidate.
authors.affiliation: Department of Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, Ohio 43210, USA.
authors.forename: Stuart
authors.initials: S
authors.lastname: Raby