Description
Chair: Haipeng An (Perimeter Institute)
Dr
Teruaki Suyama
(Research Center for the Early Universe, University of Tokyo)
11/13/13, 10:40 AM
Dark Matter
oral
Supermassive black holes(SMBHs) more massive than billion solar mass are observed at redshifts around 6. Their origin is still unknown. Primordial black holes(PBHs) being their origin is one possibility. We propose a new method which can potentially falsify the PBH scenario as the explanation of the SMBHs. Based on the observation that large density perturbations required to create PBHs also...
Mr
Ayuki Kamada
(Kavli IPMU)
11/13/13, 11:05 AM
Dark Matter
oral
I will discuss the potential of cosmic shear to constraint the light gravitino mass.
The gravitino mass, that is directly related to the supersymmetry breaking scale, is one of most fundamental parameters in the supersymmetric theory.
In the gauge mediation supersymmetric breaking (GMSB) models, the gravitino is generically the lightest supersymmetric particle (LSP) with mass in the order of...
Dr
Francis-Yan Cyr-Racine
(Jet Propulsion Laboratory/Caltech)
11/13/13, 11:30 AM
Dark Matter
oral
If all or a fraction of the dark matter (DM) were coupled to a bath of dark radiation (DR) in the early Universe we expect the combined DM-DR system to give rise to acoustic oscillations of the dark matter until it decouples from the dark radiation. Much like the standard baryon acoustic oscillations, these dark acoustic oscillations (DAO) imprint a characteristic scale, the sound horizon of...
