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- W2069354450 abstract "The scalar productions in heavy meson decays can provide a good platform to study not only heavy flavor physics but also their own physical properties in a dramatically different way. In this work, based on the assumption of two-quark structure of the scalars, the charmless hadronic ${B}_{c}ensuremath{rightarrow}SP,SV$ decays (here, $S$, $P$, and $V$ denote the light scalar, pseudoscalar, and vector mesons, respectively) are investigated by employing the perturbative QCD (pQCD) factorization approach. In the standard model all these considered ${B}_{c}$ meson decays can only occur through the annihilation diagrams. From our numerical evaluations and phenomenological analysis, we find that (a) the pQCD predictions for the $CP$-averaged branching ratios (BRs) of the considered ${B}_{c}$ decays vary in the range of ${10}^{ensuremath{-}5}$ to ${10}^{ensuremath{-}8}$, which will be tested in the ongoing LHCb and forthcoming Super-B experiments, while the $CP$-violating asymmetries for these modes are absent naturally in the standard model because only one type tree operator is involved; (b) for ${B}_{c}ensuremath{rightarrow}SP,SV$ decays, the BRs of $ensuremath{Delta}S=0$ processes are basically much larger than those of $ensuremath{Delta}S=1$ as generally expected because the different Cabibbo-Kobayashi-Maskawa factors are involved; (c) analogous to $Bensuremath{rightarrow}{K}^{*}{ensuremath{eta}}^{(ensuremath{'})}$ decays, $mathrm{Br}({B}_{c}ensuremath{rightarrow}{ensuremath{kappa}}^{+}ensuremath{eta})ensuremath{sim}5ifmmodetimeselsetexttimesfi{}mathrm{Br}({B}_{c}ensuremath{rightarrow}{ensuremath{kappa}}^{+}{ensuremath{eta}}^{ensuremath{'}})$ in the pQCD approach, which can be understood by the constructive and destructive interference between the ${ensuremath{eta}}_{q}$ and ${ensuremath{eta}}_{s}$ contributions to the ${B}_{c}ensuremath{rightarrow}{ensuremath{kappa}}^{+}ensuremath{eta}$ and ${B}_{c}ensuremath{rightarrow}{ensuremath{kappa}}^{+}{ensuremath{eta}}^{ensuremath{'}}$ decays, however, $mathrm{Br}({B}_{c}ensuremath{rightarrow}{K}_{0}^{*}(1430)ensuremath{eta})$ is approximately equal to $mathrm{Br}({B}_{c}ensuremath{rightarrow}{K}_{0}^{*}(1430){ensuremath{eta}}^{ensuremath{'}})$ in both scenarios because the factorizable contributions from the ${ensuremath{eta}}_{s}$ term play the dominant role in the considered two channels; (d) if ${a}_{0}(980)$ and $ensuremath{kappa}$ are the $qoverline{q}$ bound states, the pQCD predicted BRs for ${B}_{c}ensuremath{rightarrow}{a}_{0}(980)(ensuremath{pi},ensuremath{rho})$ and ${B}_{c}ensuremath{rightarrow}ensuremath{kappa}{K}^{(*)}$ decays will be in the range of ${10}^{ensuremath{-}6}ensuremath{sim}{10}^{ensuremath{-}5}$, which are within the reach of the LHCb experiments and could be measured in the near future; and (e) for the ${a}_{0}(1450)$ and ${K}_{0}^{*}(1430)$ channels, the BRs for ${B}_{c}ensuremath{rightarrow}{a}_{0}(1450)(ensuremath{pi},ensuremath{rho})$ and ${B}_{c}ensuremath{rightarrow}{K}_{0}^{*}(1430){K}^{(*)}$ modes in the pQCD approach are found to be $(5ensuremath{sim}47)ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}6}$ and $(0.7--36)ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}6}$, respectively. A measurement of them at the predicted level will favor the $qoverline{q}$ structure and help understand the physical properties of the scalars and the involved QCD dynamics in the modes, especially the reliability of the pQCD approach to these ${B}_{c}$ meson decays." @default.
- W2069354450 created "2016-06-24" @default.
- W2069354450 creator A5069659037 @default.
- W2069354450 creator A5077004706 @default.
- W2069354450 date "2010-09-27" @default.
- W2069354450 modified "2023-10-03" @default.
- W2069354450 title "Light scalar mesons and charmless hadronic<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mi>B</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mo>→</mml:mo><mml:mi>S</mml:mi><mml:mi>P</mml:mi><mml:mo>,</mml:mo><mml:mi>S</mml:mi><mml:mi>V</mml:mi></mml:math>decays in the perturbative QCD approach" @default.
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- W2069354450 doi "https://doi.org/10.1103/physrevd.82.054029" @default.
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