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29 March 2024
 
  » arxiv » hep-ph/0010326

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Charmless hadronic decays $B o PP, PV, VV$ and new physics effects in the general two-Higgs doublet models
Zhenjun Xiao ; Chong Sheng Li ; Kuang-Ta Chao ;
Date 28 Oct 2000
Journal Phys.Rev. D63 (2001) 074005
Subject hep-ph
AbstractBased on the low-energy effective Hamiltonian with the generalized factorization, we calculate the new physics contributions to the branching ratios of the two-body charmless hadronic decays of $B_u$ and $B_d$ mesons induced by the new gluonic and electroweak charged-Higgs penguin diagrams in the general two-Higgs doublet models (models I, II and III). Within the considered parameter space, we find that: (a) the new physics effects from new gluonic penguin diagrams strongly dominate over those from the new $gamma$- and $Z^0$- penguin diagrams; (b) in models I and II, new physics contributions to most studied B meson decay channels are rather small in size: from -15% to 20%; (c) in model III, however, the new physics enhancements to the penguin-dominated decay modes can be significant, $sim (30 -200)%$, and therefore are measurable in forthcoming high precision B experiments; (d) the new physics enhancements to ratios ${cal B}(B o K etap)$ are significant in model III, $sim (35 -70)%$, and hence provide a simple and plausible new physics interpretation for the observed unexpectedly large $B o K etap $ decay rates; (e) the theoretical predictions for ${cal B}(B o K^+ pi)$ and ${cal B}(B o K^0 pi^+)$ in model III are still consistent with the data within $2sigma$ errors; (f) the significant new physics enhancements to the branching ratios of $B o K^0 pi^0, K^* eta, K^{*+} pi^-, K^+ phi, K^{*0} omega, K^{*+} phi$ and $K^{*0} phi$ decays are helpful to improve the agreement between the data and the theoretical predictions; (g) the theoretical predictions of ${cal B}(B o PP, PV, VV)$ in the 2HDM’s are generally consistent with experimental measurements and upper limits ($90% C.L.$)
Source arXiv, hep-ph/0010326
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