We present a limit on the branching fraction for the decay B0→ ϒϒ using data collected at the ϒ(4S) resonance with the BABAR detector at the PEP-II asymmetric energy e+e− collider. Based on the observation of one event in the signal region, out of a sample of 21.3 · 106 e+e− → ϒ(4S) → BB― decays, we establish an upper limit on the branching fraction of B(B0→ ϒϒ) < 1.7 · 10−6 at the 90% confidence level. This result substantially improves upon existing limits.

Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2001). Search for the decay B^0 → gamma-gamma. PHYSICAL REVIEW LETTERS, 87(24), 1-7 [10.1103/PhysRevLett.87.241803].

Search for the decay B^0 → gamma-gamma

CARPINELLI, Massimo;
2001

Abstract

We present a limit on the branching fraction for the decay B0→ ϒϒ using data collected at the ϒ(4S) resonance with the BABAR detector at the PEP-II asymmetric energy e+e− collider. Based on the observation of one event in the signal region, out of a sample of 21.3 · 106 e+e− → ϒ(4S) → BB― decays, we establish an upper limit on the branching fraction of B(B0→ ϒϒ) < 1.7 · 10−6 at the 90% confidence level. This result substantially improves upon existing limits.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2001
87
24
1
7
241803
none
Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2001). Search for the decay B^0 → gamma-gamma. PHYSICAL REVIEW LETTERS, 87(24), 1-7 [10.1103/PhysRevLett.87.241803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390066
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