DISCRETE 2010

Session

Cosmology and astroparticles, dark matter (1)

7 Dec 2010, 14:50

CNR headquarter

76. Dark forces and light Higgs searches at BABAR

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...

123. Axial charge segregation during a first order phase transition in the presence of hypermagnetic fields

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...

28. Neutralino direct detection searches with gravitino LSP in the degenerate scenario

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...