# Measurements of branching fraction, polarization, and charge asymmetry of $B^\pm \to \rho^\pm \rho^0$ and a search for $B^\pm \to \rho^pm f_0(980)$

Abstract : We measure the branching fraction, polarization and CP asymmetry of B+ -> rho+rho0 decays and search for the decay B+ -> rho+f_0(980) based on a data sample of 231.8 million Y(4S)->BB decays collected with the BaBar detector at the SLAC PEP-II asymmetric-energy B factory. In B+ -> rho+rho0 decays we measure B=(16.8+-2.2+-2.3)x10-6, f_L=0.905+-0.042+0.023-0.027, and A_CP=-0.12+-0.13+-0.10, and find an upper limit on the branching fraction of B+ -> rho+f_0(980)(->pi+pi-) of 1.9x10-6 at 90% Confidence Level.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00113859
Contributor : Claudine Bombar <>
Submitted on : Saturday, January 27, 2007 - 1:28:19 PM
Last modification on : Wednesday, September 16, 2020 - 4:16:45 PM

### Citation

B. Aubert, M. Bona, D. Boutigny, F. Couderc, Y. Karyotakis, et al.. Measurements of branching fraction, polarization, and charge asymmetry of $B^\pm \to \rho^\pm \rho^0$ and a search for $B^\pm \to \rho^pm f_0(980)$. Physical Review Letters, American Physical Society, 2006, 97, pp.261801. ⟨10.1103/PhysRevLett.97.261801⟩. ⟨in2p3-00113859⟩

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