Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-08-20
Eur.Phys.J.C50:363-371,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 6 ps/eps figures, Revtex
Scientific paper
10.1140/epjc/s10052-007-0209-7
In this paper, we calculate the branching ratios and CP-violating asymmetries for $B_{s}\to \rho^\pm K^\mp$, $B_{s}\to\rho^{0}\bar{K}^0 $ and $B_{s}\to\omega\bar{K}^0$ decays in the perturbative QCD (pQCD) factorization approach. The theoretical predictions for the CP averaged branching ratios of the considered decays are: $Br(B_{s}\to\rho^\pm K^\mp)\approx 24.7 \times 10^{-6}$, $Br(B_{s}\to\rho^{0}\bar{K}^0) \approx 1.2 \times 10^{-7}$ and $Br(B_{s} \to\omega\bar{K}^0) \approx 1.7 \times 10^{-7}$; and we also predict very large direct CP-violating asymmetries for the latter two decay modes: $A_{CP}^{dir}(\rho^{\pm} K^{\mp})\approx -12 %$, $A_{CP}^{dir}(\rho^0\bar{K}^0)\approx -92%$, $A_{CP}^{dir}(\omega^0\bar{K}^0)\approx 81%$, $A_{CP}^{mix}(\rho^0\bar{K}^0)\approx -36%$, and $A_{CP}^{mix}(\omega^0\bar{K}^0) \approx -40%$, which can be tested in the forthcoming LHC-b experiments.
Chen Xin-fen
Guo Dong-qin
Xiao Zhen-Jun
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