The BABAR Collaboration, B. Aubert
Published 2003-11-07Version 1
We have observed the rare decay B0 => rho+ rho- in a sample of 89 million BB pairs recorded with the BABAR detector. The number of observed events is 88 +23-21 +-9, with a significance of 5.1 standard deviations with systematic uncertainties included. The branching fraction and the longitudinal polarization are measured to be BR(B0 => rho+ rho-) = (25 +7-6 +5-6)*10^{-6} and Gamma_L/Gamma = 0.98 +0.02-0.08 +-0.03, respectively.
Comments: 8 pages, 3 postscript figues, submitted to Phys. Rev. D (Rapid Communications)
Journal: Phys.Rev.D69:031102,2004
Measurement of the branching fraction, polarization, and CP asymmetry in B0 -> rho+rho- decays
Measurement of the Branching Fraction and Time-Dependent CP Asymmetry in the Decay B0->D*+D*-Ks
Measurement of the B+ --> p pbar K+ Branching Fraction and Study of the Decay Dynamics
