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EnglishWe describe searches for B meson decays to the charmless vector-vector final states ωωand ωφwith 471×106BB̄pairs 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$\pm$0.3-0.2+0.3)×10- 6, where the first uncertainty is statistical and the second is systematic, corresponding to a significance of 4.4 standard deviations. We also determine the upper limit B(B0→ωφ)<0.7×10-6 at 90{\%} confidence level. These measurements provide the first evidence for the decay B0→ωω, and an improvement of the upper limit for the decay B0→ωφ.
| Titolo: | Evidence for the decay B0→ωω and search for B0→ωφ |
| Autori: | |
| Data di pubblicazione: | 2014 |
| Rivista: | |
| Abstract: | We describe searches for B meson decays to the charmless vector-vector final states ωωand ωφwith 471×106BB̄pairs produced in e+e- annihilation at s=10.58GeV using the BABAR detector at the PEP-II collider at the SLAC National Accelerator Laboratory. We measure the branching fraction B(B0→ωω)=(1.2$\pm$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. |
| Handle: | http://hdl.handle.net/11368/2836267 |
| Digital Object Identifier (DOI): | 10.1103/PhysRevD.89.051101 |
| URL: | http://link.aps.org/doi/10.1103/PhysRevD.89.051101 |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |
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