Right-handed neutrinos and T-violating, P-conserving interactions

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• 作者：Basem Kamal El-Menoufi^a ; Michael J. Ramsey-Musolf^a ; ^b ; Chien-Yeah Seng^a ; ^{cseng@sjtu.edu.cn}
• 刊名：Physics Letters B
• 出版年：2017
• 出版时间：10 February 2017
• 年：2017
• 卷：765
• 期：Complete
• 页码：62-66
• 全文大小：341 K
• 卷排序：765

文摘

We show that experimental probes of the P-conserving, T-violating triple correlation in polarized neutron or nuclear β  -decay provide a unique probe of possible T-violation at the TeV scale in the presence of right-handed neutrinos. In contrast to other possible sources of semileptonic T-violation involving only left-handed neutrinos, those involving right-handed neutrinos are relatively unconstrained by present limits on the permanent electric dipole moments of the electron, neutral atoms, and the neutron. On the other hand, LHC results for pp→e+pp→e+ missing transverse energy imply that an order of magnitude of improvement in D-coefficient sensitivity would be needed for discovery. Finally, we discuss the interplay with the scale of neutrino mass and naturalness considerations.