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arXiv 0909.0648hep-ph
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彩色八隅体

Color Octet Leptogenesis

Marta Losada, Sean Tulin

摘要:

我们研究了Fileviez Perez和Wise最近提出的模型中的轻子生成对产生宇宙学重子不对称性的影响,该模型通过引入新的色八重态费米子和标量场,提供了一种产生单圈中微子质量的新机制.我们发现,有显着的差异与其他模型leptogenesis:低规模leptogenesis可以自然发生,CP不对称性可以是大的,因为没有上限所产生的中微子质量。CP不对称性对中微子混合矩阵中的相位不敏感。我们详细研究了能同时适用于低尺度中微子物理的极小模型,即$μ\to e γ$束缚和轻子生成。该模型可以提供出色的对撞机签名和CP-不对称的值可以从轻子味违反过程比中微子物理更多的约束。

英文摘要:

We study the implications for generating the cosmological baryon asymmetry through leptogenesis in the recent model of Fileviez Perez and Wise, which provides a new mechanism for generating neutrino masses at one-loop by introducing new color octet fermion and scalar fields. We find that there are significant differences with respect to other models for leptogenesis: low scale leptogenesis can occur naturally and the CP asymmetry can be large as there is no upper bound arising from neutrino masses. The CP asymmetry is insensitive to the phases in the neutrino mixing matrix. We investigate in detail the minimal model that can simultaneously fit low scale neutrino physics, the $μ\to e γ$ bound and leptogenesis. The model can provide outstanding collider signatures and the value of the CP-asymmetry can be more constrained from lepton flavour violating processes than from neutrino physics.

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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