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arXiv 1111.5018hep-phastro-ph.CO
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具有非反常$U(1)^{\prime}$族对称性的Dirac轻子生成

Dirac Leptogenesis with a Non-anomalous $U(1)^{\prime}$ Family Symmetry

Mu-Chun Chen, Jinrui Huang, William Shepherd

摘要:

我们提出了一个基于非异常$U(1)^{\prime}$规范族对称性的狄拉克稀薄发生模型。异常取消条件是满足没有新的手征费米子以外的三个右手中微子,引起严格的约束之间的收费。现实的质量和混合角得到所有费米子。该模型预测了狄拉克类型的中微子与自然抑制的质量。狄拉克轻子生成是通过黄子场的衰变实现的。Froggatt-Nielsen机制中类矢量重费米子的级联衰变在原轻子数的分离中起着至关重要的作用。我们发现,一个大的区域的参数空间的模型产生了一个足够的宇宙学重子数不对称通过狄拉克leptogenesis。

英文摘要:

We propose a model for Dirac leptogenesis based on a non-anomalous $U(1)^{\prime}$ gauged family symmetry. The anomaly cancellation conditions are satisfied with no new chiral fermions other than the three right-handed neutrinos, giving rise to stringent constraints among the charges. Realistic masses and mixing angles are obtained for all fermions. The model predicts neutrinos of the Dirac type with naturally suppressed masses. Dirac leptogenesis is achieved through the decay of the flavon fields. The cascade decays of the vector-like heavy fermions in the Froggatt-Nielsen mechanism play a crucial role in the separation of the primodial lepton numbers. We find that a large region of parameter space of the model gives rise to a sufficient cosmological baryon number asymmetry through Dirac leptogenesis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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