Observation of Tree-Level B Decays with ss[over ¯] Production from Gluon Radiation

B Aubert, P Del Amo Sanchez, Christopher Hawkes, Alan Watson

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18 Citations (Scopus)


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) -> (Ds+KS0)pi(-) and evidence for B--> D-s(+) K- K- and set upper limits on the branching fractions for (B) over bar (0) -> (Ds*+KS0) pi(-) and B- -> Ds*+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 Ds(*)+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.
Original languageEnglish
Article number171803
JournalPhysical Review Letters
Issue number17
Early online date1 May 2008
Publication statusPublished - 1 May 2008


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