Observation of the Decay B0->rho+rho- and Measurement of the Branching Fraction and Polarization
- SLAC
The authors have observed the rare decay B{sup 0} {yields} {rho}{sup +}{rho}{sup -} in a sample of 89 million B{bar B} pairs recorded with the BABAR detector. The number of observed events is 88{sub -21}{sup +23} {+-} 9, with a significance of 5.1 standard deviations with systematic uncertainties included. The branching fraction and the longitudinal polarization are measured to be {Beta}(B{sup 0} {yields} {rho}{sup +}{rho}{sup -}) = (25{sub -6-6}{sup +7+5}) x 10{sup -6} and {Lambda}{sub L}/{Lambda} = 0.98{sub -0.08}{sup +0.02} {+-} 0.03, respectively.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515;
- OSTI ID:
- 826530
- Report Number(s):
- SLAC-PUB-10217
- Country of Publication:
- United States
- Language:
- English
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