We describe searches for B meson decays to the charmless vector-vector final states ωω and ωϕ with 471×106BB¯ pairs produced in e+e− annihilation at 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→ωω)=(1.2±0.3+0.3−0.2)×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.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2014). Evidence for the decay B-0 -> omega omega and search for B-0 -> omega phi. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 89(5), 1-8 [10.1103/PhysRevD.89.051101].

Evidence for the decay B-0 -> omega omega and search for B-0 -> omega phi

PATRIGNANI, CLAUDIA;
2014

Abstract

We describe searches for B meson decays to the charmless vector-vector final states ωω and ωϕ with 471×106BB¯ pairs produced in e+e− annihilation at 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→ωω)=(1.2±0.3+0.3−0.2)×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.
2014
Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2014). Evidence for the decay B-0 -> omega omega and search for B-0 -> omega phi. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 89(5), 1-8 [10.1103/PhysRevD.89.051101].
Lees, J. P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lee, M. J.; Ly...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/535470
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