A search for rare charmless decays of B-d(0) and B-s(0) mesons has been performed in the exclusive channels B-d(s)(0)-->eta eta, B-d(s)(0)-->eta pi(0) and B-d(s)(0)-->pi(0) pi(0). The data sample consisted of three million hadronic Z decays collected by the L3 experiment at LEP from 1991 through 1994. No candidate event has been observed and the following upper limits at 90% confidence level on the branching ratios have been set: Br(B-d(0)--eta eta) < 4.1 x 10(-4), Br(B-s(0)-->eta eta) < 1.5 x 10(-3), Br(B-d(0)-->eta pi(0)) < 2.5 x 10(-4), Br(B-s(0)-->eta pi(0)) < 1.0 x 10(-3), Br(B-d(0)-->pi(0) pi(0)) < 6.0 x 10(-5), Br(B-s(0)-->pi(0) pi(0)) < 2.1 x 10(-4). These are the first experimental limits on B-d(0)-->eta eta and on the B-s(0) neutral charmless modes.

Search For Neutral Charmless B-decays At Lep

F. FERRONI;
1995

Abstract

A search for rare charmless decays of B-d(0) and B-s(0) mesons has been performed in the exclusive channels B-d(s)(0)-->eta eta, B-d(s)(0)-->eta pi(0) and B-d(s)(0)-->pi(0) pi(0). The data sample consisted of three million hadronic Z decays collected by the L3 experiment at LEP from 1991 through 1994. No candidate event has been observed and the following upper limits at 90% confidence level on the branching ratios have been set: Br(B-d(0)--eta eta) < 4.1 x 10(-4), Br(B-s(0)-->eta eta) < 1.5 x 10(-3), Br(B-d(0)-->eta pi(0)) < 2.5 x 10(-4), Br(B-s(0)-->eta pi(0)) < 1.0 x 10(-3), Br(B-d(0)-->pi(0) pi(0)) < 6.0 x 10(-5), Br(B-s(0)-->pi(0) pi(0)) < 2.1 x 10(-4). These are the first experimental limits on B-d(0)-->eta eta and on the B-s(0) neutral charmless modes.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12571/2953
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