We present a limit on the branching fraction for the decay B(0) --> gamma gamma using data collected at the Y(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 x 10(6) e(+)e(-) --> Y(4S) --> B(B) over bar decays, we establish an upper limit on the branching fraction of B (B(0) --> gamma gamma) < 1.7 x 10(-6) at the 90% confidence level. This result substantially improves upon existing limits.

Search for the decay B(0)->gamma gamma RID C-2728-2008 RID A-2675-2009 RID C-5223-2009 RID C-5719-2008 RID A-8865-2012 RID D-1189-2011

LUSIANI, Alberto;
2001

Abstract

We present a limit on the branching fraction for the decay B(0) --> gamma gamma using data collected at the Y(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 x 10(6) e(+)e(-) --> Y(4S) --> B(B) over bar decays, we establish an upper limit on the branching fraction of B (B(0) --> gamma gamma) < 1.7 x 10(-6) at the 90% confidence level. This result substantially improves upon existing limits.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/4758
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