Abstract
In a supersymmetric large extra dimension scenario, the production of Kaluza-Klein gravitinos accompanied by a photino at colliders is studied. We assume that a bulk supersymmetry is softly broken on our brane such that the low-energy theory resembles the MSSM. Low energy supersymmetry breaking is further assumed as in GMSB, leading to a sub-eV mass shift in each KK mode of the gravitino from the corresponding graviton KK mode. Since the photino decays within a detector due to the sufficiently large inclusive decay rate of the process yields single photon events with missing energy. Even if the total cross section can be substantial at the KK graviton background of is kinematically advantageous and thus much larger. It is shown that the observable can completely eliminate the KK graviton background but retain most of the KK gravitino signal, which provides a unique and robust method to probe the supersymmetric bulk.
- Received 6 June 2002
DOI:https://doi.org/10.1103/PhysRevD.66.056004
©2002 American Physical Society