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

Abstract

We analyze the decays {h0,H0,A0}→s¯b 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 tanβ≈0.1→0.5 and rather light charged Higgs in the 2HDM type I. When tanβ≳1, one can easily reach a branching ratio of the order 10−5. In 2HDM type II, without imposing b→sγ constraint, the situation is the same as in 2HDM type I. If b→sγ constraint on charged Higgs mass (MH±⩾350 GeV) is imposed, we obtain Br(h0→s¯b) in the range 10−5–10−6. A comparison between the rates of h0→s¯b and h0→γγ is made. It is found that in the fermiophobic scenario, h0→γγ is still the dominant decay mode.