Leptogenesis in flavor models with type I and II seesaws
Leptogenesis in flavor models with type I and II seesaws
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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
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
I. de Medeiros Varzielas
中科院分区:
文献类型:
--
作者:
D. Aristizabal Sierra;F. Bazzocchi;I. de Medeiros Varzielas
In type I seesaw models with flavor symmetries accounting for the lepton mixing angles the CP asymmetry in right-handed neutrino decays vanishes in the limit in which the mixing pattern is exact. We study the implications that additional degrees of freedom from type II seesaw may have for leptogenesis in such a limit. We classify in a model independent way the possible realizations of type I and II seesaw schemes, differentiating between classes in which leptogenesis is viable or not. We point out that even with the interplay of type I and II seesaws there are generic classes of minimal models in which the CP asymmetry vanishes. Finally we analyze the generation of the lepton asymmetry by solving the corresponding kinetic equations in the general case of a mild hierarchy between the light right-handed neutrino and the scalar triplet masses. We identify the possible scenarios in which leptogenesis can take place.
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DOI:
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发表时间:
2011
期刊:
影响因子:
--
作者:
D. A. Sierra;F. Bazzocchi
通讯作者:
F. Bazzocchi
影响因子:
5
作者:
C. Low;R. Volkas
通讯作者:
C. Low;R. Volkas
DOI:
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发表时间:
2011
期刊:
影响因子:
--
作者:
I. D. M. Varzielas;R. Felipe;H. Serodio
通讯作者:
H. Serodio
DOI:
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发表时间:
2007
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影响因子:
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作者:
E. Nardi;J. Racker;E. Roulet
通讯作者:
E. Roulet
DOI:
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发表时间:
2005
期刊:
影响因子:
--
作者:
S. Antusch;S. King
通讯作者:
S. King