Gauge Mediation in Supergravity and Gravitino Dark Matter

[摘要] Gravitinos and hidden sector fields often cause a cosmological disaster in supersymmetric models. We find that a model with gravitational gauge mediation solves such a problem quite naturally. The {mu}-problem is also absent in the model. Moreover, the abundance of gravitinos explains correct amount of dark matter of the universe. The dark matter abundance can be calculated without detailed information on the thermal history of the universe such as the reheating temperature after inflation.

[发布日期] 2006-12-01 [发布机构] Stanford Linear Accelerator Center

[关键词] Abundance;Nonluminous Matter;Supergravity;71 Classical And Quantum Mechanics, General Physics;Phenomenology-Hep,Hepph