We describe searches for B meson decays to the charmless vector-vector final states ωω and ωφ with 471×106BB̄ pairs produced in e+e- annihilation at s=10.58GeV using the BABAR detector at the PEP-II collider at the SLAC National Accelerator Laboratory. We measure the branching fraction B(B0→ωω)=(1.2±0.3-0.2+0.3)×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→ωφ)<0.7×10-6 at 90% confidence level. These measurements provide the first evidence for the decay B0→ωω, and an improvement of the upper limit for the decay B0→ωφ.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2014). Evidence for the decay B0→ωω and search for B0→ωφ. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 89(5) [10.1103/PhysRevD.89.051101].

Evidence for the decay B0→ωω and search for B0→ωφ

CARPINELLI, Massimo
Membro del Collaboration Group
;
2014

Abstract

We describe searches for B meson decays to the charmless vector-vector final states ωω and ωφ with 471×106BB̄ pairs produced in e+e- annihilation at s=10.58GeV using the BABAR detector at the PEP-II collider at the SLAC National Accelerator Laboratory. We measure the branching fraction B(B0→ωω)=(1.2±0.3-0.2+0.3)×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→ωφ)<0.7×10-6 at 90% confidence level. These measurements provide the first evidence for the decay B0→ωω, and an improvement of the upper limit for the decay B0→ωφ.
Articolo in rivista - Articolo scientifico
BABAR DETECTOR;
English
2014
Carpinelli Massimo (BABAR Collaboration)
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2014). Evidence for the decay B0→ωω and search for B0→ωφ. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 89(5) [10.1103/PhysRevD.89.051101].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389182
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