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Measurements of Branching Fraction, Polarization, and Direct-CP-Violating Charge Asymmetry in $B^+ \to K^{*0}\Rho^+$ Decays (2004)

Abstract

With a sample of 88.8 BBbar pairs produced at PEP-II in e+e- annihilation through the Upsilon(4S) resonance and recorded with the BABAR detector, we search for the B+ --> K*0 Rho+ decay mode. A signal is observed for the first time with a significance of more than 5 sigma. We measure a preliminary branching fraction of BR(B+ --> K*0 Rho+)=[17.0 +-2.9 (stat) +-2.0 (syst) +0.0 -1.9 (non-resonant)] 10(-6). The "non-resonant" error corresponds to the uncertainty from non-resonant backgrounds not modeled in the fit. The measurement of the longitudinal-polarized component to this vector-vector penguin decay is of special interest. We measure fL= 0.79 +-0.08(stat) +-0.04 (syst) +- 0.02 (non-resonant). We measure the direct-CP-violating charge asymmetry in this mode to be A_CP = -0.14 +- 0.17 +- 0.04.

Publication details

Download	http://hal.in2p3.fr/in2p3-00087442/en/
Publisher	HAL - CCSd - CNRS
Contributors	Dominique Girod
Repository	CCSd/HAL : e-articles server (based on gBUS) (France)
Keywords	Physics/High Energy Physics - Experiment
Type	ARTOUVRAGE