We report on our search for decays proceeding via a tree-level b→c quark transition in which a gluon radiates into an ss̄ pair. We present observations of the decays B-→Ds(*)+K-π- and B̄0→ Ds+KS0π- and evidence for B-→Ds+K-K- and set upper limits on the branching fractions for B̄0→Ds*+KS0π- and B-→Ds*+K-K- using 383×106 Υ(4S)→BB̄ events collected by the BABAR detector at SLAC. We present evidence that the invariant mass distributions of Ds(*)+K- pairs from B-→Ds(*)+K-π- decays are inconsistent with the phase-space model, suggesting the presence of charm resonances lying below the Ds(*)+K- threshold.

Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2008). Observation of tree-level B decays with ss̄ production from gluon radiation. PHYSICAL REVIEW LETTERS, 100(17) [10.1103/PhysRevLett.100.171803].

Observation of tree-level B decays with ss̄ production from gluon radiation

Carpinelli M;
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 ss̄ pair. We present observations of the decays B-→Ds(*)+K-π- and B̄0→ Ds+KS0π- and evidence for B-→Ds+K-K- and set upper limits on the branching fractions for B̄0→Ds*+KS0π- and B-→Ds*+K-K- using 383×106 Υ(4S)→BB̄ events collected by the BABAR detector at SLAC. We present evidence that the invariant mass distributions of Ds(*)+K- pairs from B-→Ds(*)+K-π- decays are inconsistent with the phase-space model, suggesting the presence of charm resonances lying below the Ds(*)+K- threshold.
Articolo in rivista - Articolo scientifico
Electron transitions; Particle beam dynamics; Phase space methods; Resonance; Gluon radiation; Invariant mass distributions; Quark transition; Radioactivity;
English
2008
100
17
171803
none
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2008). Observation of tree-level B decays with ss̄ production from gluon radiation. PHYSICAL REVIEW LETTERS, 100(17) [10.1103/PhysRevLett.100.171803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389621
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