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Evidence for the decay X(3872) -> psi(2S)gamma

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Evidence for the decay X(3872) -> psi(2S)gamma

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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	2016-04-20T09:51:30Z
dc.date.available	2016-04-20T09:51:30Z
dc.date.issued	2014
dc.identifier.citation	LHCb Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Ruiz Valls, Pablo Sánchez Mayordomo, Carlos 2014 Evidence for the decay X(3872) -> psi(2S)gamma Nuclear Physics B 886 665 680
dc.identifier.uri	http://hdl.handle.net/10550/52872
dc.description.abstract	Evidence for the decay mode X(3872) -> psi(2S)gamma in B+ -> X(3872)K+ decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton proton collisions, corresponding to an integrated luminosity of 3 fb(-1), collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872) -> psi(2S)gamma decay to that of the X(3872) -> J/psi gamma decay is measured to be B(X(3872) -> psi(2S)gamma)/B(X(3872) -> J/psi gamma) = 2.46 +/- 0.64 +/- 0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure D (D) over bar* molecular interpretation of the X(3872) state.
dc.language.iso	eng
dc.relation.ispartof	Nuclear Physics B, 2014, vol. 886, p. 665-680
dc.subject	Física nuclear
dc.title	Evidence for the decay X(3872) -> psi(2S)gamma
dc.type	journal article	es_ES
dc.date.updated	2016-04-20T09:51:30Z
dc.identifier.doi	10.1016/j.nuclphysb.2014.06.011
dc.identifier.idgrec	099771
dc.rights.accessRights	open access	es_ES