论文标题

重新归一化组进化在最小的seesaw模型中诱导了瘦肉模型,并具有三边的混合和mu-tau反射对称性

Renormalization group evolution induced leptogenesis in the minimal seesaw model with the trimaximal mixing and mu-tau reflection symmetry

论文作者

Zhao, Zhen-hua

论文摘要

In this paper, we consider the imbedding of the popular and well-motivated trimaximal mixing and $μ$-$τ$ reflection symmetry (which can help us shape the forms of the neutrino mass matrix) in the minimal seesaw model (which contains much fewer parameters than the general seesaw model) with two TeV-scale right-handed neutrinos (for realizing a low-scale seesaw) of nearly退化质量(实现共振的静脉生成)。但是,对于三个临时混合场景(通过此处的形式优势方法可以实现),或对于$μ$ - $τ$反射对称的对称方案,则无法进行瘦化。为了解决这个问题,我们考虑了三个中微子质量矩阵的特殊形式的三个中微子质量矩阵和$ $ $ - $ $ - $τ$反射对称对称性的可能性略微破坏,从而允许瘦素发生。已经发现,在中微子质量排序的正常情况下,因此产生的重子不对称可以重现观察到的值。为了完整性,我们还将分析扩展到了两个右撇子中微子不再退化的情况。不幸的是,在这种情况下,最终的重子不对称性小于观察到的值的数量级。

In this paper, we consider the imbedding of the popular and well-motivated trimaximal mixing and $μ$-$τ$ reflection symmetry (which can help us shape the forms of the neutrino mass matrix) in the minimal seesaw model (which contains much fewer parameters than the general seesaw model) with two TeV-scale right-handed neutrinos (for realizing a low-scale seesaw) of nearly degenerate masses (for realizing a resonant leptogenesis). However, either for the trimaximal mixing scenario (which is realized through the Form Dominance approach here) or for the $μ$-$τ$ reflection symmetry scenario, leptogenesis cannot proceed. To address this issue, we consider the possibility that the special forms of the neutrino mass matrix for the trimaximal mixing and $μ$-$τ$ reflection symmetry are slightly broken by the renormalization group evolution effect, thus allowing leptogenesis to proceed. It is found that in the normal case of the neutrino mass ordering, the baryon asymmetry thus generated can reproduce the observed value. For completeness, we have also extended our analysis to the scenario that two right-handed neutrinos are not nearly degenerate any more. Unfortunately, in this scenario the final baryon asymmetry is smaller than the observed value by several orders of magnitude.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源