Prospects for Hypercharged Anomaly Mediated SUSY Breaking at the LHC

Understand

We investigate the phenomenological consequences of string models wherein the MSSM resides on a D-brane, and the hypercharge gaugino mass is generated in a geometrically separated hidden sector.

• This hypercharged anomaly-mediated SUSY breaking (HCAMSB) model naturally solves the tachyonic slepton mass problem endemic to pure AMSB scenarios.
• In HCAMSB, one obtains a mass ordering M_1>\mu >M_2 with split left- and right- scalars, whereas in mAMSB models, one obtains \mu >M_1>M_2 with nearly degenerate left- and right-scalars.
• We compute the allowed parameter space and expected superparticle mass spectrum in the HCAMSB model.