Branching ratios andCP-violating asymmetries of Bs→h1h2 decays in the general two-Higgs-doublet models
Year: 2001
Type: article
Abstract: Based on the low-energy effective Hamiltonian with generalized factorization, we calculate the new physics contributions to branching ratios and CP-violating asymmetries of the charmless hadronic decays ${B}_{s}\ensuremath{\rightarrow}{h}_{1}{h}_{2}$ in the standard model and the general two-Higgs-doublet models (models I, II, and III). Within the considered parameter space, we find the following. (a) In models I and II, the new physics corrections are always small in size and will be masked by other larger known theoretical uncertainties. (b) In model III, the new physics corrections to the branching ratios of those QCD penguin-dominated decays ${B}_{s}\ensuremath{\rightarrow}{K}^{0}{\ensuremath{\eta}}^{{(}^{\ensuremath{'}})}{,K}^{+}{K}^{\ensuremath{-}*},$ etc., are large in size and insensitive to the variations of ${M}_{{H}^{+}}$ and ${N}_{c}^{\mathrm{eff}}.$ For tree- or electroweak penguin-dominated decay modes, however, the new physics corrections are very small in size. (c) For ${B}_{s}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}*}$ and the other seven decay modes, the branching ratios are at the level of $(1--3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$ and will be measurable at future hadron colliders with large b production. (d) Among the studied 39 ${B}_{s}$ meson decay modes, seven of them can have a CP-violating asymmetry ${\mathcal{A}}_{\mathrm{CP}}$ larger than $20%$ in magnitude. The new physics corrections are small or moderate in magnitude. (e) Because of its large and ${N}_{c}^{\mathrm{eff}}$ stable branching ratio and CP-violating asymmetry, the decay ${B}_{s}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}*}$ seems to be the ``best'' channel to find $\mathrm{CP}$ violation of ${B}_{s}$ system through studies of two-body charmless decays of the ${B}_{s}$ meson.
Authors: Dong Zhang, Zhenjun Xiao, Chong Sheng Li
Institution: Peking University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: B介子系统CP破坏与新粒子圈图效应唯象研究
OpenAlex ID: W2099563281