Decoupling of Massive Right-handed Neutrinos

Details Decoupling of Massive Right-handed Neutrinos Decoupling of Massive Right-handed Neutrinos

1999-07-09

arxiv.org/abs/hep-ph/9907290v1

Phys.Rev. D61 (2000) 033002

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 Pages, Latex, 2 figures

Scientific paper

10.1103/PhysRevD.61.033002

We investigate the effect of B+L - violating anomalous generation of massive right-handed neutrinos on their decoupling, when the right-handed neutrino mass is considerably greater than the right-handed gauge boson masses. Considering normal annihilation channels, the Lee-Weinberg type of calculation, in this case, gives an upper bound of about 700 Gev, which casts doubt on the existence of such a right-handed neutrino mass greater than right-handed gauge boson masses. We examine the possibility that a consideration of anomalous effects related to the SU(2)_R gauge group may turn this into a lower bound of the order of 100 Tev.

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