Higgs bosons decay into bottom-strange in two Higgs doublets models

摘要

We analyze the decays {h(0), H-0, A(0)} -> sb within two Higgs doublet models with natural flavor conservation (2HDM) type I and II. It is found that the Higgs bosons decay into bottom-strange can lead to a branching ratio in the range 10(-5) -> 10(-3) for small tan beta approximate to 0.1 -> 0.5 and rather light charged Higgs in the 2HDM type I. When tan beta greater than or similar to 1, one can easily reach a branching ratio of the order 10(-5). In 2HDM type II, without imposing b -> s gamma constraint, the situation is the same as in 2HDM type I. If b -> s gamma constraint on charged Higgs mass (MH +/- >= 350 GeV) is imposed, we obtain Br(h(0) -> sb) in the range 10(-5)-10(-6). A comparison between the rates of h(0) -> sb and h(0) -> gamma gamma is made. It is found that in the fermiophobic scenario, h(0) -> gamma gamma is still the dominant decay mode. (c) 2005 Elsevier B.V. All rights reserved.