arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0909.5468hep-ph
收藏

整体轻子数自发对称性破缺的轻子生成界限

Leptogenesis Bound on Spontaneous Symmetry Breaking of Global Lepton Number

Pei-Hong Gu, Utpal Sarkar

摘要:

提出了一类新的整体轻子数自发对称性破缺的轻子生成界。由于Majorons的存在,这些模型具有诱导新的轻子数违反相互作用的一般特征。我们分析了含有右手中微子的单重态Majoron模型,发现要实现轻子生成,轻子数必须突破10^5 GeV以上,因为右手中微子湮灭成无质量Majoron和标准模型Higgs的过程必须在sphaleron过程结束前达到平衡.然后,我们认为,这种类型的leptogenesis约束应该存在于单重态-三重态的Majoron模型,以及在一类R-宇称违反超对称Majoron模型。

英文摘要:

We propose a new class of leptogenesis bounds on the spontaneous symmetry breaking of global lepton number. These models have a generic feature of inducing new lepton number violating interactions, due to the presence of the Majorons. We analyzed the singlet Majoron model with right-handed neutrinos and find that the lepton number should be broken above 10^5 GeV to realize a successful leptogenesis because the annihilations of the right-handed neutrinos into the massless Majorons and into the standard model Higgs should go out of equilibrium before the sphaleron process is over. We then argue that this type of leptogenesis constraint should exist in the singlet-triplet Majoron models as well as in a class of R-parity violating supersymmetric Majoron models.

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。

↑