Observation of the Decay B0 => rho+ rho- and Measurement of the Branching Fraction and Polarization
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
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.
8 pages, 3 postscript figues, submitted to Phys. Rev. D (Rapid Communications)
8 pages, 3 postscript figues, submitted to Phys. Rev. D (Rapid Communications)