Utility of a Special Second Scalar Doublet

Details Utility of a Special Second Scalar Doublet Utility of a Special Second Scalar Doublet

2008-02-20

arxiv.org/abs/0802.2917v1

Mod.Phys.Lett.A23:647-652,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 figure

Scientific paper

10.1142/S0217732308026649

This Brief Review deals with the recent resurgence of interest in adding a second scalar doublet (eta^+,eta^0) to the Standard Model of particle interactions. In most studies, it is taken for granted that eta^0 should have a nonzero vacuum expectation value, even if it may be very small. What if there is an exactly conserved symmetry which ensures =0? The phenomenological ramifications of this idea include dark matter, radiative neutrino mass, leptogenesis, and grand unification.

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