Título:
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Study of B0→D*-π+π-π+ and B0→D*-K+π-π+ decays
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Autor/a:
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Camboni, Alessandro; Comerma Montells, Albert; Garrido Beltrán, Lluís; Graciani Díaz, Ricardo; Graugés Pous, Eugeni; López Asamar, Elias; Picatoste Olloqui, Eduardo; Potterat, Cédric; Ruiz, Hugo (Ruiz Pérez); Vázquez Gómez, Ricard; Abellan Beteta, Carlos; Calvo Gómez, Míriam; Vilasis-Cardona, Xavier; Domingo Bonal, Francesc; LHCb Collaboration
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Otros autores:
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Universitat de Barcelona |
Abstract:
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Using proton-proton collision data collected by the LHCb experiment at √ s = 7 TeV , corresponding to an integrated luminosity of 1.0 fb − 1 , the ratio of branching fractions of the B 0 → D * − π + π − π + decay relative to the B 0 → D * − π + decay is measured to be B ( B 0 → D * − π + π − π + ) B ( B 0 → D * − π + ) = 2.64 ± 0.04 ( stat ) ± 0.13 ( syst ) . The Cabibbo-suppressed decay B 0 → D * − K + π − π + is observed for the first time, and the measured ratio of branching fractions is B ( B 0 → D * − K + π − π + ) B ( B 0 → D * − π + π − π + ) = ( 6.47 ± 0.37 ( stat ) ± 0.35 ( syst ) ) × 10 − 2 . A search for orbital excitations of charm mesons contributing to the B 0 → D * − π + π − π + final state is also performed, and the first observation of the B 0 → ¯¯¯ D 1 ( 2420 ) 0 π + π − decay is reported with the ratio of branching fractions B ( B 0 → ( ¯¯¯ D 1 ( 2420 ) 0 → D * − π + ) π − π + ) B ( B 0 → D * − π + π − π + ) = ( 2.04 ± 0.42 ( stat ) ± 0.22 ( syst ) ) × 10 − 2 , where the numerator represents a product of the branching fractions B ( B 0 → ¯¯¯ D 1 ( 2420 ) 0 π − π + ) and B ( ¯¯¯ D 1 ( 2420 ) 0 → D * − π + ) . |
Materia(s):
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-Física de partícules -Experiments -Particle physics -Experiments |
Derechos:
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cc by (c) CERN; LHCb Collaboration, 2013
http://creativecommons.org/licenses/by/3.0/es/ |
Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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American Physical Society
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