Search for the decay B0→γγ
We report the result of a search for the rare decay B0→γγ in 426 fb−1 of data, corresponding to 226×106 B0B[bar]0 pairs, collected on the Υ(4S) 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...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
7 February 2011
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Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2011, Jahrgang: 83, Heft: 3, Pages: 1-11 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.83.032006 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.83.032006 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.83.032006 
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| Verfasserangaben: | BABAR Collaboration* |
| Zusammenfassung: | We report the result of a search for the rare decay B0→γγ in 426 fb−1 of data, corresponding to 226×106 B0B[bar]0 pairs, collected on the Υ(4S) 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 1.8σ. This corresponds to a branching fraction B(B0→γγ)=(1.7±1.1(stat.)±0.2(syst.))×10−7. Based on this result, we set a 90% confidence level upper limit of B(B0→γγ)<3.2×10−7. |
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| Beschreibung: | *BABAR Collaboration: P. del Amo Sanchez, J. Marks, U. Uwer [und 439 weitere Personen] Im Titel ist die Zahl 0 hochgestellt Gesehen am 06.10.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.83.032006 |