Evidence for the decay B0 --> omega omega and search for B0 --> omega phi
Abstract
We describe searches for B meson decays to the charmless vector-vector final states omega omega and omega phi with 471 x 10^6 B Bbar pairs produced in e+ e- annihilation at sqrt(s) = 10.58 GeV using the BABAR detector at the PEP-II collider at the SLAC National Accelerator Laboratory. We measure the branching fraction B(B0 --> omega omega) = (1.2 +- 0.3 +0.3-0.2) x 10^-6, where the first uncertainty is statistical and the second is systematic, corresponding to a significance of 4.4 standard deviations. We also determine the upper limit B(B0 --> omega phi) < 0.7 x 10^-6 at 90% confidence level. These measurements provide the first evidence for the decay B0 --> omega omega, and an improvement of the upper limit for the decay B0 --> omega phi.
- Publication:
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arXiv e-prints
- Pub Date:
- November 2013
- DOI:
- 10.48550/arXiv.1312.0056
- arXiv:
- arXiv:1312.0056
- Bibcode:
- 2013arXiv1312.0056T
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- 7 pages, 2 postscript figures