arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1904.04787hep-phhep-ex
收藏

重中微子振荡中的CP破坏效应:对对撞机和轻子生成的影响

CP Violating Effects in Heavy Neutrino Oscillations: Implications for Colliders and Leptogenesis

P. S. Bhupal Dev, Rabindra N. Mohapatra, Yongchao Zhang

摘要:

跷跷板机制的两个重要含义是:(i)理解小中微子质量的简单方法,以及(ii)宇宙中物质-反物质不对称性的起源。对于TeV尺度的跷跷板模型,成功的leptogenesis要求右手中微子(RHN)必须是准简并的,如果它们具有CP破坏相,它们也有助于CP不对称性。我们在TeV尺度的左右跷跷板模型中对此进行了研究,并指出了一种方法来探测强子对撞机中RHN的CP破坏混合的准简并可能性,该方法使用相同符号的双轻子电荷不对称性(SSCA)构造的简单观测量。特别是,我们隔离的参数区域的模型,在那里可以使用SSCA在大型强子对撞机,以及未来的27 TeV和100 TeV的强子对撞机测试leptogenesis的可行性。我们还独立证实了早期的结果,有一个通用的下限约10 TeV的leptogenesis工作的$W_R$质量。

英文摘要:

Two of the important implications of the seesaw mechanism are: (i) a simple way to understand the small neutrino masses, and (ii) the origin of matter-anti-matter asymmetry in the universe via the leptogenesis mechanism. For TeV-scale seesaw models, successful leptogenesis requires that the right-handed neutrinos (RHNs) must be quasi-degenerate and if they have CP violating phases, they also contribute to the CP asymmetry. We investigate this in the TeV-scale left-right models for seesaw and point out a way to probe the quasi-degeneracy possibility with CP violating mixings for RHNs in hadron colliders using simple observables constructed out of same-sign dilepton charge asymmetry (SSCA). In particular, we isolate the parameter regions of the model, where the viability of leptogenesis can be tested using the SSCA at the Large Hadron Collider, as well as future 27 TeV and 100 TeV hadron colliders. We also independently confirm an earlier result that there is a generic lower bound on the $W_R$ mass of about 10 TeV for leptogenesis to work.

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。

↑