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• W3041103539 abstract "In this paper, we studied systematically the semileptonic decays ${overline{B}}_{s}ensuremath{rightarrow}{K}^{(*)}{ensuremath{ell}}^{+}{ensuremath{ell}}^{ensuremath{-}}$ with ${l}^{ensuremath{-}}=({e}^{ensuremath{-}},{ensuremath{mu}}^{ensuremath{-}},{ensuremath{tau}}^{ensuremath{-}})$ by using the perturbative QCD (PQCD) and the ``$mathrm{PQCD}+mathrm{Lattice}$'' factorization approach, respectively. We first evaluated all relevant form factors ${F}_{i}({q}^{2})$ in the low-${q}^{2}$ region using the PQCD approach, and we also took the available lattice QCD results at the end point ${q}_{mathrm{max}}^{2}$ as additional inputs to improve the extrapolation of the form factors to the high-${q}^{2}$ region. We calculated the branching ratios and twelve other kinds of physical observables. From our studies, we find the following points: (a) for ${overline{B}}_{s}ensuremath{rightarrow}K{l}^{+}{l}^{ensuremath{-}}$ decays, the PQCD and $mathrm{PQCD}+mathrm{Lattice}$ predictions for branching ratios $mathcal{B}({overline{B}}_{s}ensuremath{rightarrow}K{l}^{+}{l}^{ensuremath{-}})$, the ratios of the branching ratios ${R}_{K}^{eensuremath{mu}}$ and ${R}_{K}^{ensuremath{mu}ensuremath{tau}}$, and the longitudinal polarization asymmetry of the leptons ${P}_{L}$ agree well within errors; (b) the PQCD and $mathrm{PQCD}+mathrm{Lattice}$ predictions for the $CP$-averaged branching ratio $mathcal{B}({overline{B}}_{s}ensuremath{rightarrow}{K}^{*}{ensuremath{mu}}^{+}{ensuremath{mu}}^{ensuremath{-}})$ are $(3.1{7}_{ensuremath{-}0.78}^{+0.95})ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}8}$ and $(2.4{8}_{ensuremath{-}0.50}^{+0.56})ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}8}$ respectively, which agree well with the LHCb measured value $(2.9ifmmodepmelsetextpmfi{}1.1)ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}8}$ and the light-cone sum rule prediction; (c) for the ratios ${R}_{{K}^{*}}^{eensuremath{mu}}$ and ${R}_{{K}^{*}}^{ensuremath{mu}ensuremath{tau}}$, the PQCD and $mathrm{PQCD}+mathrm{Lattice}$ predictions agree well with each other and have a small error less than 10%; (d) for the direct $CP$ asymmetries ${mathcal{A}}_{CP}$ of all considered decay modes, they are always very small as expected: less than 5% in magnitude; (e) for the angular observables ${P}_{1,2,3}$ and ${P}_{4,5,6,8}^{ensuremath{'}}$, our theoretical predictions for each kind of lepton are consistent within errors; (f) the theoretical predictions of the angular observables ${P}_{3}$ and ${P}_{6}^{ensuremath{'}}$ are less than ${10}^{ensuremath{-}2}$ in size, but the magnitude of ${P}_{1,2}$ and ${P}_{4,5}^{ensuremath{'}}$ are larger than 0.2; and (g) the PQCD and $mathrm{PQCD}+mathrm{Lattice}$ predictions of the binned values of all considered observables in the two ${q}^{2}$ bins $[0.1--0.98]text{ }text{ }{mathrm{GeV}}^{2}$ and $[1.1--6]text{ }text{ }{mathrm{GeV}}^{2}$ generally agree with each other and are also consistent with the light-cone sum rule results within errors. We believe that above predictions could be tested by future LHCb and Belle-II experiments." @default.
• W3041103539 created "2020-07-16" @default.
• W3041103539 creator A5033898863 @default.
• W3041103539 creator A5077004706 @default.
• W3041103539 creator A5091196440 @default.
• W3041103539 date "2020-07-07" @default.
• W3041103539 modified "2023-10-12" @default.
• W3041103539 title "Study of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mi>B</mml:mi><mml:mi>s</mml:mi></mml:msub><mml:mo stretchy=false>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mrow><mml:mo stretchy=false>(</mml:mo><mml:mo>*</mml:mo><mml:mo stretchy=false>)</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>−</mml:mo></mml:msup></mml:math> decays in the PQCD factorization approach with …" @default.
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• W3041103539 doi "https://doi.org/10.1103/physrevd.102.013001" @default.
• W3041103539 hasPublicationYear "2020" @default.

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