Common origin of cold dark matter and baryon asymmetry in the anomaly mediated SUSY breaking model

por Grigoris Panatopoulos (University of Munich)

jueves 2 abr. 2009 11:00 → 12:00 Europe/Madrid

Sala Seminarios (Dpto. de Física Teórica (UVEG))

The possibility that the baryon asymmetry in the universe and cold dark matter can have a common origin is investigated. They both may arise from the decays of a heavy scalar field identified with the inflaton. Baryon asymmetry is explained via non-thermal leptogenesis, while the role of cold dark matter is played by the lightest neutralino. In the anomaly mediated supersymmetry breaking model, the lightest neutralino is mostly a wino, and the gravitino is very heavy and safe for cosmology. The conditions under which dark matter and baryon asymmetry are unified are determined