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We calculate the CP-averaged branching ratios and CP-violating asymmetries ofa number of two-body charmless hadronic decays $\bar{B_s^0} \to PP, PV, VV$ inthe perturbative QCD (pQCD) approach to leading order in $\alpha_s$ (here $P$and $V$ denote light pseudoscalar and vector mesons, respectively). Themixing-induced CP violation parameters are also calculated for these decays. Wealso predict the polarization fractions of $B_s \to VV$ decays and find thatthe transverse polarizations are enhanced in some penguin dominated decays suchas $\bar{B_s^0} \to K ^{*}\bar{K^{*}}$, $K ^{*}\rho$. Some of the predictionsworked out here can already be confronted with the recently available data fromthe CDF collaboration on the branching ratios for the decays $ \bar{B_s^0} \toK^+\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 currenterrors. A large number of predictions for the branching ratios, CP-asymmetriesand vector-meson polarizations in $\bar{B_s^0}$ decays, presented in this paperand compared with the already existing results in other theoretical frameworks,will be put to stringent experimental tests in forthcoming experiments atFermilab, LHC and Super B-factories.Comment: 70 pages, 7 figures, to appear in Physical Review D; several input  parameters modified resulting in changes in several tables and ratios of  branching ratios; added reference

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

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