arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1708.02247hep-phastro-ph.COhep-exhep-th
收藏

无菌中微子与B-L对称性

Sterile Neutrinos and B-L Symmetry

Pavel Fileviez Perez, Clara Murgui

摘要:

我们重新讨论了中微子质量与B-L规范对称性自发破缺的关系。我们讨论了狄拉克和马约拉纳中微子的主要方案,并指出中微子质量的两个简单的机制。在这种情况下,中微子质量可以在树水平或量子水平上产生,并且预测存在质量低于eV尺度的非常轻的无菌中微子。详细讨论了轻子数破坏过程如μ到e和μ到e γ的预言。研究了宇宙学约束对相对论自由度有效数的影响。

英文摘要:

We revisit the relation between the neutrino masses and the spontaneous breaking of the B-L gauge symmetry. We discuss the main scenarios for Dirac and Majorana neutrinos and point out two simple mechanisms for neutrino masses. In this context the neutrino masses can be generated either at tree level or at quantum level and one predicts the existence of very light sterile neutrinos with masses below the eV scale. The predictions for lepton number violating processes such as mu to e and mu to e gamma are discussed in detail. The impact from the cosmological constraints on the effective number of relativistic degree of freedom is investigated.

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。

↑