arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1806.07412hep-ph
收藏

具有高尺度纹理零的Mu-tau反射对称性

Mu-tau reflection symmetry with a high scale texture-zero

C. C. Nishi, B. L. Sánchez-Vega, G. Souza Silva

摘要:

$μτ$ -反射对称中微子质量矩阵可以容纳所有已知的中微子混合角,最大大气角固定,并预测所有未知的轻子扇区CP相位,但不能预测绝对中微子质量标度。在这里,我们提出了一个高度预测的情况下,$μτ$ -反射与离散阿贝尔对称性相结合,以强制执行纹理零的质量矩阵的重右手中微子产生轻中微子质量。这样的限制将低能理论的自由参数降低到零,中微子的绝对质量尺度被限制在几个离散的区域,三个在几meV范围内,一个延伸到30 meV左右。重中微子区只依赖于两个自由参数,而这两个自由参数又被成功地限制在小范围内。质量简并重中微子在一种情况下是可能的,但没有共振增强CP不对称性。

英文摘要:

The $μτ$-reflection symmetric neutrino mass matrix can accommodate all known neutrino mixing angles, with maximal atmospheric angle fixed, and predicts all the unknown CP phases of the lepton sector but is unable to predict the absolute neutrino mass scale. Here we present a highly predictive scenario where $μτ$-reflection is combined with a discrete abelian symmetry to enforce a texture-zero in the mass matrix of the heavy right-handed neutrinos that generate the light neutrino masses. Such a restriction reduces the free parameters of the low energy theory to zero and the absolute neutrino mass scale is restricted to few discrete regions, three in the few meV range and one extending up to around 30 meV. The heavy neutrino sector is dependent only on two free parameters which are further restricted to small regions from the requirement of successful leptogenesis. Mass degenerate heavy neutrinos are possible in one case but there is no resonant enhancement of the CP asymmetry.

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。

↑