We measure the branching fraction (B), polarization (fL), and CP asymmetry (ACP) of B±→ρ±ρ0 decays and search for the decay B±→ρ±f0(980) based on a data sample of 231.8×106 Υ(4S)→BB̄ decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. In B±→ρ±ρ0 decays we measure B=(16.8±2.2±2.3)×10-6, fL=0.905±0.042-0. 027+0.023, and ACP=-0.12±0.13±0.10, and find an upper limit on the branching fraction of B±→ρ±f0(980)(→π+π-) decays of 1.9×10-6 at 90% confidence level.

Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Measurements of branching fraction, polarization, and charge asymmetry of B±→ρ±ρ0 and a search for B±→ρ± f0(980). PHYSICAL REVIEW LETTERS, 97(26) [10.1103/PhysRevLett.97.261801].

Measurements of branching fraction, polarization, and charge asymmetry of B±→ρ±ρ0 and a search for B±→ρ± f0(980)

Carpinelli M;
2006

Abstract

We measure the branching fraction (B), polarization (fL), and CP asymmetry (ACP) of B±→ρ±ρ0 decays and search for the decay B±→ρ±f0(980) based on a data sample of 231.8×106 Υ(4S)→BB̄ decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. In B±→ρ±ρ0 decays we measure B=(16.8±2.2±2.3)×10-6, fL=0.905±0.042-0. 027+0.023, and ACP=-0.12±0.13±0.10, and find an upper limit on the branching fraction of B±→ρ±f0(980)(→π+π-) decays of 1.9×10-6 at 90% confidence level.
Articolo in rivista - Articolo scientifico
Electromagnetic wave polarization; Electron energy levels; Particle detectors; Branching fraction; Data samples; Upper limits; Charged particles;
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Measurements of branching fraction, polarization, and charge asymmetry of B±→ρ±ρ0 and a search for B±→ρ± f0(980). PHYSICAL REVIEW LETTERS, 97(26) [10.1103/PhysRevLett.97.261801].
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