Determination of the X(3872) Meson Quantum Numbers

Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN

dc.contributor	Universitat Ramon Llull. La Salle
dc.contributor	CERN
dc.contributor.author	Calvo Gómez, Míriam
dc.contributor.author	Camboni, Alessandro
dc.contributor.author	Vilasís Cardona, Xavier
dc.contributor.author	LHCb Collaboration - CERN
dc.date.accessioned	2020-06-19T17:36:27Z
dc.date.accessioned	2023-10-02T06:32:30Z
dc.date.available	2020-06-19T17:36:27Z
dc.date.available	2023-10-02T06:32:30Z
dc.date.created	2013
dc.date.issued	2013-05-29
dc.identifier.uri	http://hdl.handle.net/20.500.14342/3294
dc.description.abstract	The quantum numbers of the X(3872) meson are determined to be JPC=1++ based on angular correlations in B+→X(3872)K+ decays, where X(3872)→π+π−J/ψ and J/ψ→μ+μ−. The data correspond to 1.0 fb−1 of pp collisions collected by the LHCb detector. The only alternative assignment allowed by previous measurements JPC=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.	eng
dc.format.extent	8 p.	ca
dc.language.iso	eng	ca
dc.publisher	American Physical Society	ca
dc.relation.ispartof	Physical Review Letters, 2013, Vol. 110, No. 22 (Maig)	ca
dc.rights	Attribution 4.0 International
dc.rights	© CERN
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/
dc.source	RECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.other	Gran col·lisionador d'hadrons (França i Suïssa)	ca
dc.subject.other	Partícules (Física nuclear)	ca
dc.subject.other	Col·lisions (Física nuclear)	ca
dc.title	Determination of the X(3872) Meson Quantum Numbers	ca
dc.type	info:eu-repo/semantics/article	ca
dc.type	info:eu-repo/semantics/publishedVersion	ca
dc.rights.accessLevel	info:eu-repo/semantics/openAccess
dc.embargo.terms	cap	ca
dc.subject.udc	53
dc.identifier.doi	https://doi.org/10.1103/PhysRevLett.110.222001	ca