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

Basem Kamal El-Menoufi, Michael J. Ramsey-Musolf, Chien-Yeah Seng
2017 Physics Letters B  
We show that experimental probes of the P-conserving, T-violating triple correlation in polarized neutron or nuclear $\beta$-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
more » ... tron, neutral atoms, and the neutron. On the other hand, LHC results for $pp\to e+$ 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.
doi:10.1016/j.physletb.2016.11.061 fatcat:p3oqmc32kbfkdpio2fd2qgky4u