Leptogenesis in the presence of exact flavor symmetries
Leptogenesis in the presence of exact flavor symmetries
复制标题
存在精确风味对称性的轻体发生
DOI:
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复制
发表时间:
2011
期刊:
影响因子:
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通讯作者:
F. Bazzocchi
中科院分区:
文献类型:
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作者:
D. A. Sierra;F. Bazzocchi
A bstractIn 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 A4 flavor model realization.
DOI:
10.1016/j.nuclphysb.2012.01.009
发表时间:
2012
期刊:
Nuclear Physics
影响因子:
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作者:
D. Aristizabal Sierra;F. Bazzocchi;I. de Medeiros Varzielas
通讯作者:
I. de Medeiros Varzielas