First observation of the decays ¯¯¯B0(s)→D+sK−π+π− and ¯¯¯B0s→Ds1(2536)+π−

The first observation of the decays ¯¯¯ B 0 s → D + s K − π + π − and ¯¯¯ B 0 → D + s K − π + π − are reported using an integrated luminosity of 1.0     fb − 1 recorded by the LHCb experiment. The branching fractions, normalized with respect to ¯¯¯ B 0 s → D + s π − π + π − and ¯¯¯ B 0 s → D + s K −...

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Detalles Bibliográficos
Autores: Abellan Beteta, Carlos, Calvo Gómez, Míriam, Camboni, Alessandro, Comerma Montells, Albert, Domingo Bonal, Francesc, Garrido Beltrán, Lluís, Grabalosa Gándara, Marc, Graciani Díaz, Ricardo, Graugés Pous, Eugeni, López Asamar, Elias, Pérez-Calero Yzquierdo, Antonio, Picatoste Olloqui, Eduardo, Pie Valls, B. (Blai), Potterat, Cédric, Rives Molina, Vicente José, Ruiz, Hugo (Ruiz Pérez), Vázquez Gómez, Ricard, Vilasis-Cardona, Xavier, LHCb Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/131787
Acceso en línea:https://hdl.handle.net/2445/131787
Access Level:acceso abierto
Palabra clave:Física de partícules
Experiments
Particle physics
Descripción
Sumario:The first observation of the decays ¯¯¯ B 0 s → D + s K − π + π − and ¯¯¯ B 0 → D + s K − π + π − are reported using an integrated luminosity of 1.0     fb − 1 recorded by the LHCb experiment. The branching fractions, normalized with respect to ¯¯¯ B 0 s → D + s π − π + π − and ¯¯¯ B 0 s → D + s K − π + π − , respectively, are measured to be B ( ¯¯¯ B 0 s → D + s K − π + π − ) B ( ¯¯¯ B 0 s → D + s π − π + π − ) = ( 5.2 ± 0.5 ± 0.3 ) × 10 − 2 and B ( ¯¯¯ B 0 → D + s K − π + π − ) B ( ¯¯¯ B 0 s → D + s K − π + π − ) = 0.54 ± 0.07 ± 0.07 , where the first uncertainty is statistical and the second is systematic. The ¯¯¯ B 0 s → D + s K − π + π − decay is of particular interest as it can be used to measure the weak phase γ . First observation of the ¯¯¯ B 0 s → D s 1 ( 2536 ) + π − , D + s 1 → D + s π − π + decay is also presented, and its branching fraction relative to ¯¯¯ B 0 s → D + s π − π + π − is found to be B ( ¯¯¯ B 0 s → D s 1 ( 2536 ) + π − , D + s 1 → D + s π − π + ) B ( ¯¯¯ B 0 s → D + s π − π + π − ) = ( 4.0 ± 1.0 ± 0.4 ) × 10 − 3

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