205652
20181203023801.0
1029-8479
10.1007/Jhep08(2014)014
doi
000347888000006
ISI
ARTICLE
Weak scale baryogenesis in a supersymmetric scenario with R-parity violation
New York
2014
Springer
2014
34
Journal Articles
We investigate the connection between R-parity violation (RPV) in supersymmetric models and Baryogenesis. First we discuss in detail the assumptions of a theorem by Nanopoulos and Weinberg on the CP asymmetry generated from the decay of massive particles. In light of this statement, we analyse some interesting models of Baryogenesis through RPV. We then explore, in the context of RPV SUSY, the possibility to generate the baryon asymmetry through the out-of-equilibrium decay of a metastable Weakly Interacting Massive Particle (WIMP), as proposed in [1]. This setting is also motivated by the observed coincidence between the abundances of dark and baryonic matter. In this framework, we propose two models of out-of-equilibrium decay of a would-be cold relic, and compute the associated CP asymmetry. With a TeV-scale parent, the observed baryon abundance can be reproduced in these models when the stop is in the multi-TeV region. Furthermore, annihilation of the metastable particle into SM states must be characterised by a very weak coupling, g similar to 10(-2) and by a heavy mediator m med similar to 10TeV. These models can also accommodate stop masses far from the TeV scale, at the expense of weakening the explanation of the Omega(B) - Omega(DM) coincidence.
Supersymmetry Phenomenology
Rompineve, Fabrizio
Ecole Polytech Fed Lausanne, Inst Theorie Phenomenes Phys, CH-1015 Lausanne, Switzerland
8
Journal Of High Energy Physics
ITP
252443
U10181
oai:infoscience.tind.io:205652
article
EPFL-ARTICLE-205652
EPFL
PUBLISHED
REVIEWED
ARTICLE