Observation of the Decay B0->rho+rho- and Measurement of the Branching Fraction and Polarization

Details Observation of the Decay B0->rho+rho- and Measurement of the Branching Fraction and Polarization Observation of the Decay B0->rho+rho- and Measurement of the Branching Fraction and Polarization

2003-08-08

arxiv.org/abs/hep-ex/0308024v2

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.

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