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- W2048670071 abstract "The hadronic charmless B decays into a scalar meson and a vector meson are studied within the framework of QCD factorization. The main results are: (i) The decay rates for the $f_0(980)K^{*-}$ and $f_0(980)ov K^{*0}$ modes depend on the $f_0-sigma$ mixing angle $theta$. The experimental measurements can be accommodated for $thetaapprox 20^circ$. (ii) If the $a_0(980)$ is a $qbar q$ bound state, the predicted branching ratios for the channels $a_0^+rho^-$ and $a_0^0rho^-$ will be very large, of order $30times 10^{-6}$ and $23times 10^{-6}$, respectively. If the observation of or the experimental limit on theses two modes is much smaller than the expectation of $sim 25times 10^{-6}$, this could hint at a four-quark nature for the $a_0(980)$. (iii) For the $a_0(1450)$ channels, $a_0^+(1450)rho^-$ and $a_0^0(1450)rho^-$ are found to have branching ratios of order $16times 10^{-6}$ and $22times 10^{-6}$, respectively. A measurement of them at the predicted level will favor the $qbar q$ structure for the $a_0(1450)$. (iv) Contrary to the naive expectation that $Gamma(B^-to a_0^0rho^-)sim {1over 2}Gamma(bar B^0to a_0^+rho^-)$, we found that they have comparable rates due to additional contributions to the $a_0rho^-$ mode from the $a_0^0$ emission. (v) The predicted central value of $Br(bar B^0toov K^{*0}_0(1430)phi)$ is larger than experiment, though it can be accommodated within theoretical errors. The decays $Bto K^{*}_0(1430)rho$ are expected to have rates substantially larger than that of $Bto K^{*}_0(1430)pi$ owing to the constructive (destructive) interference between the $a_4$ and $a_6$ penguin terms in the former (latter). Experimentally, it is thus important to check if the $Bto K^{*}_0rho$ modes are enhanced relative to the corresponding $K_0^*pi$ channels." @default.
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- W2048670071 date "2008-01-30" @default.
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- W2048670071 title "Charmless<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>B</mml:mi></mml:math>decays to a scalar meson and a vector meson" @default.
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- W2048670071 doi "https://doi.org/10.1103/physrevd.77.014034" @default.
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