Effects of extended Higgs sector on loop-induced B decays
Journal
Nuclear Physics, Section B
Journal Volume
210
Journal Issue
1-2
Pages
54-72
Date Issued
1988
Author(s)
R.S. Willey
Abstract
Extended Higgs sectors generally involve charged Higgs bosons (H±). Effects of these charged Higgs bosons on various loop-induced processes (b → sγ, b → sg* and b → sℓ+ℓ-) in the B-meson system are discussed, within the framework of two Higgs doublet models (2HDM's). In these models there are just two additional parameters associated with the effect of the H±-mH and the ratio of the two vacuum expectation values. The H+ contribution to the dipole moment form factor turns out to be very significant; furthermore, it leads to rather different effects for the two types of 2HDM's. Bd mixing constrains the above parameters. Even with these constraints, strong enhancements of decay rates are possible. In the case of b → sγ, strong suppressions are also possible in one of the 2HDM's. Constraints on the parameters of an extended Higgs sector coming from continued improvement of experimental limits on these processes are as important as (and complementary to) constraints from Bd mixing. We also briefly consider the prospects of distinguishing between the effects of charged Higgs bosons and the effects of a fourth fermion generation on these processes. © 1989.
SDGs
Type
journal article