We report on our search for decays proceeding via a tree-level b -> c quark transition in which a gluon radiates into an s (s) over bar pair. We present observations of the decays B(-)-> D(s)(*)(+)K(-) pi(-) and (B) over bar (0) -> D(s)(+)K(S)(0)pi(-) and evidence for B(-)-> D(s)(+) K(-) K(-) and set upper limits on the branching fractions for (B) over bar (0) -> D(s)(*+)K(S)(0) pi(-) and B(-) -> D(s)(*+)K(-) K(-) using 383 x 10(6) gamma(4S)-> B (B) over bar events collected by the BABAR detector at SLAC. We present evidence that the invariant mass distributions of D(s)((*)+)K(-) pairs from B(-) -> D(s)(*)(+)K(-)pi(-) decays are inconsistent with the phase-space model, suggesting the presence of charm resonances lying below the D(s)(*)(+) K(-) threshold.

Observation of tree-level B decays with s(s)over-bar production from gluon radiation RID C-5223-2009 RID C-5719-2008 RID D-1055-2009

LUSIANI, Alberto;
2008

Abstract

We report on our search for decays proceeding via a tree-level b -> c quark transition in which a gluon radiates into an s (s) over bar pair. We present observations of the decays B(-)-> D(s)(*)(+)K(-) pi(-) and (B) over bar (0) -> D(s)(+)K(S)(0)pi(-) and evidence for B(-)-> D(s)(+) K(-) K(-) and set upper limits on the branching fractions for (B) over bar (0) -> D(s)(*+)K(S)(0) pi(-) and B(-) -> D(s)(*+)K(-) K(-) using 383 x 10(6) gamma(4S)-> B (B) over bar events collected by the BABAR detector at SLAC. We present evidence that the invariant mass distributions of D(s)((*)+)K(-) pairs from B(-) -> D(s)(*)(+)K(-)pi(-) decays are inconsistent with the phase-space model, suggesting the presence of charm resonances lying below the D(s)(*)(+) K(-) threshold.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/4912
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