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http://hdl.handle.net/2445/131745
Title: | Search for the decay B0→γγ |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 7-Feb-2011 |
Publisher: | American Physical Society |
Abstract: | We report the result of a search for the rare decay B 0 → γ γ in 426 fb − 1 of data, corresponding to 226 × 10 6 B 0 ¯¯¯ B 0 pairs, collected on the Υ ( 4 S ) resonance at the PEP-II asymmetric-energy e + e − collider using the BABAR detector. We use a maximum likelihood fit to extract the signal yield and observe 21 + 13 − 12 signal events with a statistical significance of 1.8 σ . This corresponds to a branching fraction B ( B 0 → γ γ ) = ( 1.7 ± 1.1 ( stat . ) ± 0.2 ( syst . ) ) × 10 − 7 . Based on this result, we set a 90% confidence level upper limit of B ( B 0 → γ γ ) < 3.2 × 10 − 7 . |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.83.032006 |
It is part of: | Physical Review D, 2011, vol. 83, num. 3, p. 032006 |
URI: | http://hdl.handle.net/2445/131745 |
Related resource: | https://doi.org/10.1103/PhysRevD.83.032006 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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601997.pdf | 292.32 kB | Adobe PDF | View/Open |
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