Utility of a Special Second Scalar Doublet
arXiv:0802.2917 · doi:10.1142/S0217732308026649
Abstract
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 <eta^0>=0? The phenomenological ramifications of this idea include dark matter, radiative neutrino mass, leptogenesis, and grand unification.
9 pages, 1 figure
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