Charmless non-leptonic B_s decays to PP, PV and VV final states in the pQCD approach

Details Charmless non-leptonic B_s decays to PP, PV and VV final states in the pQCD approach Charmless non-leptonic B_s decays to PP, PV and VV final states in the pQCD approach

2007-03-15

arxiv.org/abs/hep-ph/0703162v2

Phys.Rev.D76:074018,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

70 pages, 7 figures, to appear in Physical Review D; several input parameters modified resulting in changes in several tables

Scientific paper

10.1103/PhysRevD.76.074018

We calculate the CP-averaged branching ratios and CP-violating asymmetries of a number of two-body charmless hadronic decays $\bar{B_s^0} \to PP, PV, VV$ in the perturbative QCD (pQCD) approach to leading order in $\alpha_s$ (here $P$ and $V$ denote light pseudoscalar and vector mesons, respectively). The mixing-induced CP violation parameters are also calculated for these decays. We also predict the polarization fractions of $B_s \to VV$ decays and find that the transverse polarizations are enhanced in some penguin dominated decays such as $\bar{B_s^0} \to K ^{*}\bar{K^{*}}$, $K ^{*}\rho$. Some of the predictions worked out here can already be confronted with the recently available data from the CDF collaboration on the branching ratios for the decays $ \bar{B_s^0} \to K^+\pi^-$, $ \bar{B_s^0} \to K^+K^-$ and the CP-asymmetry in the decay $ \bar{B_s^0} \to K^+\pi^-$, and are found to be in agreement within the current errors. A large number of predictions for the branching ratios, CP-asymmetries and vector-meson polarizations in $\bar{B_s^0}$ decays, presented in this paper and compared with the already existing results in other theoretical frameworks, will be put to stringent experimental tests in forthcoming experiments at Fermilab, LHC and Super B-factories.

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