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- W1515652023 abstract "In this paper we first calculate the form factors of $B to (pi,K)$ and $B_s to K $ transitions by employing the perturbative QCD (pQCD) factorization approach with the inclusion of the next-to-leading-order(NLO) corrections, and then we calculate the branching ratios of the corresponding semileptonic decays $B/B_s to (pi, K)(l^+l^-,lnu,nubar{nu})$ (here $l$ denotes $e, mu$ and $tau$). Based on the numerical calculations and phenomenological analysis, we found the following results: (a) For $B to (pi, K)$ and $B_s to K$ transition form factors $F_{0,+,rmt}(q^2)$, the NLO pQCD predictions for the values of $F_{0,+,rmt}(0)$ and their $q^2$-dependence agree well with those obtained from other methods; (b) For $bar{B}^0 to pi^+l^-bar{nu}_l, bar{K}^0 l^+ l^- $ and $B^- to pi^0 l^-bar{nu}_l, K^- l^+ l^-$ decay modes, the NLO pQCD predictions for their branching ratios agree very well with the measured values; (c) By comparing the pQCD predictions for $Br(bar{B}^0 to pi^+l^-bar{nu}_l)$ with the measured decay rate we extract out the magnitude of $V_{ub}$: $|V_{ub}|= (3.80^{+0.56}_{-0.50}(theor.)) times 10^{-3}$; (d) We also defined several ratios of the branching ratios, $R_nu, R_C$ and $R_{N1,N2,N3}$, and presented the corresponding pQCD predictions, which will be tested by LHCb and the forthcoming Super-B experiments." @default.
- W1515652023 created "2016-06-24" @default.
- W1515652023 creator A5027853606 @default.
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- W1515652023 date "2012-12-19" @default.
- W1515652023 modified "2023-09-25" @default.
- W1515652023 title "Semileptonic decays<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>B</mml:mi><mml:mo>/</mml:mo><mml:msub><mml:mi>B</mml:mi><mml:mi>s</mml:mi></mml:msub><mml:mo>→</mml:mo><mml:mo mathvariant=bold stretchy=false>(</mml:mo><mml:mi>π</mml:mi><mml:mo>,</mml:mo><mml:mi>k</mml:mi><mml:mo mathvariant=bold stretchy=false>)</mml:mo><mml:mo mathvariant=bold stretchy=false>(</mml:mo><mml:msup><mml:mi>l</mml:mi><mml:mo mathvariant=bold>+</mml:mo></mml:msup><…" @default.
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- W1515652023 doi "https://doi.org/10.1103/physrevd.86.114025" @default.
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