Prof.
Yury Kolomensky
(UC Berkeley/LBNL)
07/12/2010, 14:50
Cosmology and astroparticles, dark matter searches
We present searches for exotic new particles, including light weakly-
interacting gauge bosons, low-mass Higgs bosons, and dark-matter
candidates, performed with the BABAR detector and the PEP-II
asymmetric B-Factory. Such particles appear in extensions of the
Standard Model that attempt to explain recent astro-particle data and
fix the hierarchy problem of the Standard Model...
Dr
Gabriella Piccinelli
(Centro tecnologico, FES Aragón, Universidad Nacional Autónoma de México)
07/12/2010, 15:15
T, C, P, CP symmetries, Accidental symmetries (B, L conservation)
We study the scattering of fermions off a finite width bubble wall during the electroweak phase transition in the presence of a background hypermagnetic field.
We show that the chiral nature of the fermion coupling with the background field in the symmetric phase generates an axial asymmetry in the scattering processes. We discuss possible implications of such axial charge segregation for...
Dr
Grigoris Panotopoulos
(University of Valencia and IFIC)
07/12/2010, 15:40
Cosmology and astroparticles, dark matter searches
In the framework of the constrained NMSSM it is assumed that the gravitino LSP and the lightest neutralino NLSP are nearly degenerate in mass. In this scenario the neutralino is quasi-stable, the BBN constraints are easily avoided,
and a large reheating temperature compatible with thermal leptogenesis can be obtained. Since the neutralino is extremely long-lived, a) it partially contributes...
