Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-10-20
Phys.Lett. B473 (2000) 148-156
Physics
High Energy Physics
High Energy Physics - Phenomenology
Latex file, 14 pages with 6 PS or EPS figures. corrected some typos, added new references
Scientific paper
10.1016/S0370-2693(99)01469-0
We calculate the enhancements to the inclusive charmless decays of b quark, $b \to s g, s q\bar{q}, sgg$, from gluon penguin diagrams induced by the charged and neutral Higgs bosons $(H^{\pm}, h^0, H^0$, and A^0) in the Two-Higgs-Doublet Model with flavor-changing couplings. Within the considered parameter space, the new contributions from charged Higgs boson are dominant. After including the new contributions, the branching ratio $BR(b \to sg)$ (q^2 =0) can be increased form $\sim 0.2%$ in the standard model to 4.4% and 2.6% in the two-Higgs-doublet model for $m_{H^+}=100$ and 200 GeV, respectively. The new contribution to the decay mode $b \to s q \bar{q}$ with q=(u,d,s) is, however, numerically small and peaked at the lower q^2 region. The new contribution to $b \to s gg$ can also be neglected.
Chao Kuang-Ta
Li Chong Sheng
Xiao Zhenjun
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