Large solar angle and see-saw mechanism: a bottom-up perspective
Large solar angle and see-saw mechanism: a bottom-up perspective
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大太阳角和跷跷板机制：自下而上的视角
DOI：
10.1016/s0550-3213(02)00256-0
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
C. Savoy
中科院分区：
文献类型：
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作者：
S. Lavignac;I. Masina;C. Savoy
除了公认的大气角之外，在轻子星区可能还存在一个大的太阳角。在拉锯法的背景下，通过自下而上的方法，我们探索了狄拉克和马约拉纳右手质量矩阵的哪些模式以稳健的方式和最少的调谐量提供了两个大的混合。出现了三种最受欢迎的模式，就右手中微子所扮演的角色而言，这三种模式具有提示性的物理解释：在太阳和大气领域，要么是一对右手中微子，要么是一对伪狄拉克中微子。每一种模式都产生了中微子混合角和质量差之间的特定关系，这导致了对Ue3的可测试约束。文中还讨论了与LFV带电轻子衰变速率的关系。
In addition to the well established large atmospheric angle, a large solar angle is probably present in the leptonic sector. In the context of the see-saw and by means of a bottom-up approach, we explore which patterns for the Dirac and Majorana right-handed mass matrices provide two large mixings in a robust way and with the minimal amount of tuning. Three favorite patterns emerge, which have a suggestive physical interpretation in terms of the role played by right-handed neutrinos: in both solar and atmospheric sectors, either a single or a pseudo-Dirac pair of right-handed neutrinos dominates. Each pattern gives rise to specific relations among the neutrino mixing angles and mass differences, which lead to testable constraints on Ue3. The connection with the rate of LFV charged lepton decays is also addressed.