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- W2948291530 endingPage "114705" @default.
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- W2948291530 abstract "By employing the perturbative QCD (PQCD) factorization approach, we made a systematic investigation for the CP-averaged branching ratios and the CP-violating asymmetries of the thirteen $bar{B}^0_s to PP $ decays ( here $P=(pi,K, eta, eta^{prime})$) with the inclusion of all currently known next-to-leading order (NLO) contributions, and compared our results with the measured values or the theoretical predictions from other different approaches. We focused on the examination of the effects of the NLO contributions and found the following points: (a) for $bar{B}_s^0 to (K^0 bar{K}^0, K^+ K^-, eta^prime eta^prime,pi^- K^+)$ decays, the NLO contributions can provide a $(40-150) %$ enhancement or a $20%$ reduction to the corresponding leading order (LO) PQCD predictions for their decay rates and result in a much better agreement between the PQCD predictions and the experimental measurements; (b) for the pure annihilation decay $bar{B}_s^0 to pi^+pi^-$, the PQCD prediction still remain consistent with the data after the inclusion of the small NLO reduction; (c) the PQCD predictions for the ratio $(f_s/f_d)cdot {cal B}(B_s^0to pi^+pi^-)/{cal B}(B^0to K^+pi^-)$ and $(f_s/f_d)cdot {cal B}(B_s^0to pi^+ K^-)/{cal B}(B^0to K^+pi^-)$ become agree very well with the measured ones after the inclusion of a $40%$ NLO reduction; (d) for $bar{B}_s^0 to K^+ K^-$ and $bar{B}_s^0 to pi^- K^+$ decays, the NLO PQCD predictions for their CP-violating asymmetries do agree very well with the measured values in both the sign and the magnitude; and (e) for all $bar{B}_s^0 to P P$ decays, we also compared our results with those obtained in the QCD factorization approach and soft-collinear effective theory and discussed their similarities and differences." @default.
- W2948291530 created "2019-06-14" @default.
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- W2948291530 date "2019-09-01" @default.
- W2948291530 modified "2023-10-14" @default.
- W2948291530 title "Anatomy of B → PP decays and effects of the next-to-leading order contributions in the perturbative QCD approach" @default.
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- W2948291530 doi "https://doi.org/10.1016/j.nuclphysb.2019.114705" @default.
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