Título:
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Observation of Tree-Level B Decays with s¯s Production from Gluon Radiation
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Autor/a:
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Garra Ticó, Jordi; Graugés Pous, Eugeni; BABAR Collaboration
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Otros autores:
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Universitat de Barcelona |
Abstract:
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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 pair. We present observations of the decays B − → D ( * ) + s K − π − and ¯¯¯ B 0 → D + s K 0 S π − and evidence for B − → D + s K − K − and set upper limits on the branching fractions for ¯¯¯ B 0 → D * + s K 0 S π − and B − → D * + s K − K − using 383 × 10 6 Υ ( 4 S ) → B ¯¯¯ B 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 − π − decays are inconsistent with the phase-space model, suggesting the presence of charm resonances lying below the D ( * ) + s K − threshold. |
Materia(s):
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-Física de partícules -Experiments -Particle physics -Experiments |
Derechos:
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(c) American Physical Society, 2008
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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American Physical Society
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