Baryon asymmetry of the Universe; Models beyond the standard model; Leptogenesis
Abstract :
[en] We consider variations of the standard leptogenesis picture arising from the presence of an additional scale related to the breaking of a U(1)X abelian flavor symmetry. We show that quite generically the presence of an additional energy scale might introduce new qualitative and quantitative changes on leptogenesis. Especially interesting is the possibility of having succesful TeV leptogenesis with a vanishing total CP violating asymmetry. By solving the corresponding Boltzmann equations it is shown that these kind of scenarios encounters no difficulties in generating the cosmic baryon asymmetry.
Disciplines :
Physics
Author, co-author :
Aristizabal Sierra, Diego ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules
Munoz, Luis Alfredo
Enrico, Nardi
Language :
English
Title :
Implications of an additional scale on leptogenesis
Publication date :
2009
Event name :
DISCRETE'08: Symposium on Prospects in the Physics of Discrete Symmetries
Event date :
From 11-12-2008 to 16-12-2008
Audience :
International
Journal title :
Journal of Physics. Conference Series
ISSN :
1742-6588
eISSN :
1742-6596
Publisher :
Institute of Physics Publishing IOP, Bristol, United Kingdom