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Determination of the X(3872) Meson Quantum Numbers

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dc.contributor.author	LHCb Collaboration
dc.contributor.author	Oyanguren Campos, Arantza
dc.contributor.author	Ruiz Valls, Pablo
dc.date.accessioned	2014-03-31T13:10:31Z
dc.date.available	2014-03-31T13:10:31Z
dc.date.issued	2013
dc.identifier.citation	LHCb Collaboration Oyanguren Campos, Arantza Ruiz Valls, Pablo 2013 Determination of the X(3872) Meson Quantum Numbers Physical Review Letters 110 22 222001 - 1 222001 - 8
dc.identifier.uri	http://hdl.handle.net/10550/33882
dc.description.abstract	The quantum numbers of the X(3872) meson are determined to be J(PC) = 1(++) based on angular correlations in B+ -> X(3872)K+ decays, where X(3872) -> pi(+) pi(-) j/psi and J/psi -> pi(+) mu(-). The data correspond to 1.0 fb(-1) of pp collisions collected by the LHCb detector. The only alternative assignment allowed by previous measurements J(PC) = 2(-+) is rejected with a confidence level equivalent to more than 8 Gaussian standard deviations using a likelihood-ratio test in the full angular phase space. This result favors exotic explanations of the X(3872) state.
dc.relation.ispartof	Physical Review Letters, 2013, vol. 110, num. 22, p. 222001 - 1-222001 - 8
dc.subject	Física nuclear
dc.title	Determination of the X(3872) Meson Quantum Numbers
dc.type	journal article	es_ES
dc.date.updated	2014-03-31T13:10:31Z
dc.identifier.doi	10.1103/PhysRevLett.110.222001
dc.identifier.idgrec	094078
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1103/PhysRevLett.110.222001