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Observation of tree-level B decays with ss production from gluon radiation |
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| Authors: | Aubert B Bona M Boutigny D Karyotakis Y Lees J P Poireau V Prudent X Tisserand V Zghiche A Garra Tico J Grauges E Lopez L Palano A Eigen G Stugu B Sun L Abrams G S Battaglia M Brown D N Button-Shafer J Cahn R N Groysman Y Jacobsen R G Kadyk J A Kerth L T Kolomensky Yu G Kukartsev G Lopes Pegna D Lynch G Mir L M Orimoto T J Ronan M T Tackmann K Wenzel W A Del Amo Sanchez P Hawkes C M Watson A T Held T Koch H Lewandowski B Pelizaeus M Schroeder T Steinke M Walker D Asgeirsson D J Cuhadar-Donszelmann T Fulsom B G Hearty C Mattison T S McKenna J A Khan A Saleem M Teodorescu L Blinov V E Bukin A D |
| Institution: | Laboratoire de Physique des Particules, IN2P3/CNRS et Université de Savoie, F-74941 Annecy-Le-Vieux, France. |
| Abstract: | We report on our search for decays proceeding via a tree-level b-->c quark transition in which a gluon radiates into an ssover ] pair. We present observations of the decays B;{-}-->D_{s};{+}K;{-}pi;{-} and Bover ];{0}-->D_{s};{+}K_{S};{0}pi;{-} and evidence for B;{-}-->D_{s};{+}K;{-}K;{-} and set upper limits on the branching fractions for Bover ];{0}-->D_{s};{+}K_{S};{0}pi;{-} and B;{-}-->D_{s};{+}K;{-}K;{-} using 383x10;{6} Upsilon(4S)-->BBover ] 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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