Leptogenesis in the presence of exact flavor symmetries

Leptogenesis in the presence of exact flavor symmetries
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存在精确风味对称性的轻体发生

DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
F. Bazzocchi
F. Bazzocchi
中科院分区:
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文献类型:
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作者:
D. A. Sierra;F. Bazzocchi

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一个在轻子扇区中具有味对称性的bstractIn模型,与标准的轻子生成情景相比,轻子生成可以以一种非常不同的方式发生。我们研究了在味对称阶段这类模型中B − L不对称性的产生,指出成功的leptogenesis要求(i)右手中微子位于味群的不同不可约表示中;(ii)黄酮至少比右手中微子表示中的一个更轻。当这些条件得到满足leptogenesis收益由于新的贡献CP违反不对称性和-取决于特定的模型-在几个阶段。我们证明了这些参数的有效性,通过详细研究的生成的B-L不对称的一个具体的A4风味模型实现的情况下。
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.
具有 I 型和 II 型跷跷板的风味模型中的轻体发生
DOI: 10.1016/j.nuclphysb.2012.01.009
发表时间: 2012
期刊: Nuclear Physics
影响因子: --
作者:
D. Aristizabal Sierra;F. Bazzocchi;I. de Medeiros Varzielas
通讯作者: I. de Medeiros Varzielas