arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0707.0841hep-ph
收藏

在标准模型的B-L扩展的TeV尺度中中微子质量、混合和稀薄生成

Neutrino masses, mixing and leptogenesis in TeV scale B-L extension of the standard model

M . Abbas, S. Khalil

摘要:

我们在TeV尺度的标准模型的$B-L$扩展中讨论中微子质量和混合问题。我们证明了如果狄拉克中微子质量为$10^{-4}$ Gev量级,那么测量的中微子质量是正确的.我们提出了夸克和轻子之间的质量关系,可以解释这样小的狄拉克中微子质量。我们分析了这种模型中的leptogenesis,并提供了新的贡献,由于预测额外的希格斯和额外的中性规范玻色子的解析表达式。我们发现,热稀薄发生加上近简并右手中微子引起的共振增强,可以产生足够的重子不对称性。最后,我们评论了一个可能的方案,非热leptogenesis,这是由于额外的希格斯衰变为右手中微子。

英文摘要:

We address the issue of the neutrino masses and mixing in TeV scale $B-L$ extension of the Standard Model. We show that if Dirac neutrino masses are of order $10^{-4}$ Gev, then the measured neutrino masses are correctly obtained. We propose a mass relation between quarks and leptons that may account for such small Dirac neutrino masses. We analyze the leptogenesis in this type of models and provide analytical expressions for the new contributions due to the predicted extra Higgs and extra neutral gauge boson. We find that thermal leptogenesis, with a resonant enhancement due to nearly degenerate right-handed neutrinos, can yield sufficient baryon asymmetry. Finally, we comment on a possible scheme for non-thermal leptogenesis, which is due to the decay of extra Higgs into right-handed neutrino.

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。

↑