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Observation of the Lambda(0)(b) -> J / psi p pi(-) decay

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Observation of the Lambda(0)(b) -> J / psi p pi(-) decay

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dc.contributor.author	LHCb Collaboration
dc.contributor.author	Martínez Vidal, Fernando
dc.contributor.author	Oyanguren Campos, Arantza
dc.contributor.author	Ruiz Valls, Pablo
dc.contributor.author	Sánchez Mayordomo, Carlos
dc.date.accessioned	2016-04-20T08:05:57Z
dc.date.available	2016-04-20T08:05:57Z
dc.date.issued	2014
dc.identifier.citation	LHCb Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Ruiz Valls, Pablo Sánchez Mayordomo, Carlos 2014 Observation of the Lambda(0)(b) -> J / psi p pi(-) decay Journal Of High Energy Physics 07 07 103-1 103-19
dc.identifier.uri	http://hdl.handle.net/10550/52849
dc.description.abstract	The first observation of the Cabibbo-suppressed decay Lambda(0)(b) -> J / psi p pi(-) is reported using a data sample of proton-proton collisions at 7 and 8TeV, corresponding to an integrated luminosity of 3 fb(-1). A prominent signal is observed and the branching fraction relative to the decay mode Lambda(0)(b) -> J / psi pK(-) is determined to be B(Lambda(0)(b) -> J / psi p pi(-))/ B(Lambda(0)(b) -> J / psi pK(-)) = 0.0824 +/- 0.0025 (stat) +/- 0.0042 (syst). A search for direct CP violation is performed. The difference in the CP asymmetries between these two decays is found to be ACP(Lambda(0)(b) -> J / psi p pi(-))/ A(CP)(Lambda(0)(b) -> J / psi pK(-)) = (+5.7 +/- 2.4 (stat) +/- 1.2 (syst))%, which is compatible with CP symmetry at the 2.2 sigma level.
dc.language.iso	eng
dc.relation.ispartof	Journal Of High Energy Physics, 2014, vol. 07, num. 07, p. 103-1-103-19
dc.subject	Física nuclear
dc.title	Observation of the Lambda(0)(b) -> J / psi p pi(-) decay
dc.type	journal article	es_ES
dc.date.updated	2016-04-20T08:05:57Z
dc.identifier.doi	10.1007/JHEP07(2014)103
dc.identifier.idgrec	101794
dc.rights.accessRights	open access	es_ES