Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/131190
Title: | Evidence for the decay B0 → ωω and search for B0 → ωϕ |
Author: | Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 5-Mar-2014 |
Publisher: | American Physical Society |
Abstract: | We describe searches for B meson decays to the charmless vector-vector final states ω ω and ω ϕ with 471 × 1 0 6 B ¯ B 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 ( B 0 → ω ω ) = ( 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 ( B 0 → ω ϕ ) < 0.7 × 10 − 6 at 90% confidence level. These measurements provide the first evidence for the decay B 0 → ω ω , and an improvement of the upper limit for the decay B 0 → ω ϕ . |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.89.051101 |
It is part of: | Physical Review D, 2014, vol. 89, num. 5, p. 051101(R) |
URI: | http://hdl.handle.net/2445/131190 |
Related resource: | https://doi.org/10.1103/PhysRevD.89.051101 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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