Measurements of Branching Fraction and Polarization in B^+ -> rho^+ K^{*0} Decay

Details Measurements of Branching Fraction and Polarization in B^+ -> rho^+ K^{*0} Decay Measurements of Branching Fraction and Polarization in B^+ -> rho^+ K^{*0} Decay

2005-05-14

arxiv.org/abs/hep-ex/0505039v2

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 3 figures

Scientific paper

We present the results of a study of the charmless vector-vector decay $B^+\to \rho^+K^{*0}$, based on 253 fb$^{-1}$ of data collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We obtain the branching fraction ${\cal B}(B^+\to\rho^+ K^{*0})=(8.9\pm 1.7(\rm stat)\pm 1.2 (\rm syst))\times 10^{-6}$. We also perform a helicity analysis of the $\rho$ and $K^*$ vector mesons, and obtain the longitudinal polarization fraction $f_L(B^+\to \rho^+ K^{*0})=0.43 \pm 0.11(\rm stat)^{+0.05}_{-0.02}(\rm syst)$.

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