# Observation of $B^+\to\rho^+K^0$ and Measurement of its Branching Fraction and Charge Asymmetry

Abstract : We present the first observation of the decay $B^+\to\rho^+K^0$, using a data sample of 348 fb$^{-1}$ collected at the $\Upsilon(4S)$ resonance with the \babar detector.The branching fraction and charge asymmetry are measured to be $(8.0^{+1.4}_{-1.3}\pm0.5)\times10^{-6}$ and ($-12.2\pm16.6\pm2.0)%$, respectively, where the first uncertainty is statistical and the second is systematic. The significance of the observed branching fraction, including systematic uncertainties, is 7.9 standard deviations.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00137427
Contributor : Claudine Bombar <>
Submitted on : Monday, March 19, 2007 - 5:43:36 PM
Last modification on : Wednesday, September 16, 2020 - 4:20:31 PM

### Citation

B. Aubert, M. Bona, D. Boutigny, Y. Karyotakis, J.P. Lees, et al.. Observation of $B^+\to\rho^+K^0$ and Measurement of its Branching Fraction and Charge Asymmetry. Physical Review D, American Physical Society, 2007, 76, pp.011103. ⟨10.1103/PhysRevD.76.011103⟩. ⟨in2p3-00137427⟩

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