Article (Scientific journals)
Leptogenesis in the presence of exact flavor symmetries
Aristizabal Sierra, Diego; Bazzocchi, Federica
2012In Journal of High Energy Physics
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Keywords :
Flavor symmetries; Baryon asymmetry; Leptogenesis
Abstract :
[en] In models with flavor symmetries in the leptonic sector leptogenesis can take place in a very different way compared to the standard leptogenesis scenario. We study the generation of a B−L asymmetry in these kind of models in the flavor symmetric phase pointing out that successful leptogenesis requires (i) the right-handed neutrinos to lie in different irreducible representations of the flavor group; (ii) the flavons to be lighter at least that one of the right-handed neutrino representations. When these conditions are satisfied leptogenesis proceeds due to new contributions to the CP violating asymmetry and — depending on the specific model — in several stages. We demonstrate the validity of these arguments by studying in detail the generation of the B − L asymmetry in a scenario of a concrete A 4 flavor model realization.
Disciplines :
Physics
Author, co-author :
Aristizabal Sierra, Diego ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules
Bazzocchi, Federica;  SISSA > High energy physics division
Language :
English
Title :
Leptogenesis in the presence of exact flavor symmetries
Publication date :
March 2012
Journal title :
Journal of High Energy Physics
ISSN :
1126-6708
eISSN :
1029-8479
Publisher :
Institute of Physics Publishing (IOP), Bristol, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 January 2013

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