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arXiv 0904.3052hep-ph
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附加量表对纤毛虫发生的影响

Implications of an additional scale on leptogenesis

D. Aristizabal Sierra, Luis Alfredo Muñoz, Enrico Nardi

摘要:

我们认为标准leptogenesis图片的变化所产生的额外的规模有关的$U(1)_X$阿贝尔味对称性的破坏的存在。我们表明,一般来说,额外能量规模的存在可能会给纤体发生带来新的质和量的变化。特别有趣的是,有成功的TeV leptogenesis与消失的总CP违反不对称的可能性。通过求解相应的玻尔兹曼方程,表明这类方案在产生宇宙重子不对称性方面没有遇到困难。

英文摘要:

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.

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