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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.
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http://hal.in2p3.fr/in2p3-00914016
Contributor : Sabine Starita <>
Submitted on : Wednesday, December 4, 2013 - 5:28:52 PM
Last modification on : Wednesday, September 16, 2020 - 4:18:26 PM

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J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Evidence for the decay B0 --> omega omega and search for B0 --> omega phi. Physical Review D, American Physical Society, 2014, 89, pp.051101. ⟨10.1103/PhysRevD.89.051101⟩. ⟨in2p3-00914016⟩

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