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Search for the decay B0→γγ

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del Amo Sanchez, P., Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M. et al.

. (2011) Search for the decay B0→γγ. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.83 (No.3). 032006 . ISSN 1550-7998

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1103/PhysRevD.83.032006

Abstract

We report the result of a search for the rare decay B(0) -> gamma gamma in 426 fb(-1) of data, corresponding to 226 x 10(6) B(0)(B) over bar (0) pairs, collected on the Y(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(-12)(+13) signal events with a statistical significance of 1.8 sigma. This corresponds to a branching fraction B(B(0) -> gamma gamma) = (1.7 +/- 1.1(stat.) +/- 0.2(syst.)) x 10(-7). Based on this result, we set a 90% confidence level upper limit of B(B(0) -> gamma gamma) < 3.2 x 10(-7).

Item Type:

Journal Article

Subjects:

Q Science > QC Physics

Divisions:

Faculty of Science > Physics

Journal or Publication Title:

Physical Review D (Particles, Fields, Gravitation and Cosmology)

Publisher:

American Physical Society

ISSN:

1550-7998