Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2003-08-08
Physics
High Energy Physics
High Energy Physics - Experiment
15 pages, 8 postscript figures, Contributed to the XXIst International Symposium on Lepton and Photon Interactions at High Ene
Scientific paper
We have observed the rare decay B0->rho+rho- in a sample of 89 million BBbar
pairs recorded with the BABAR detector. We measure the branching fraction
B(B0->rho+rho-)=(27+7-6+5-7)10^-6 and determine the longitudinal polarization
fraction Gamma_L/Gamma=0.99+0.01-0.07+-0.03. Our results are preliminary.
"The BABAR Collaboration
Aubert B.
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