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Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays

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Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays

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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	2016-04-20T09:37:25Z
dc.date.available	2016-04-20T09:37:25Z
dc.date.issued	2014
dc.identifier.citation	LHCb Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Ruiz Valls, Pablo Sánchez Mayordomo, Carlos 2014 Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays Physical Review D 90 1 012003-1 012003-21
dc.identifier.uri	http://hdl.handle.net/10550/52860
dc.description.abstract	The resonant structure of the reaction (B) over bar (0) --> J/psi pi(+)pi(-) is studied using data from 3 fb(-1) of integrated luminosity collected by the LHCb experiment, one third at 7 TeV center-of-mass energy and the remainder at 8 TeV. The invariant mass of the pi(+)pi(-) pair and three decay angular distributions are used to determine the fractions of the resonant and nonresonant components. Six interfering pi(+)pi(-) states, rho(770), f(0)(500), f(2)(1270), rho(1450), omega(782) and rho(1700), are required to give a good description of invariant mass spectra and decay angular distributions. The positive and negative charge parity fractions of each of the resonant final states are determined. The f(0)(980) meson is not seen and the upper limit on its presence, compared with the observed f(0)(500) rate, is inconsistent with a model where these scalar mesons are formed from two quarks and two antiquarks (tetraquarks) at the eight standard deviation level. In the q (q) over bar model, the absolute value of the mixing angle between the f(0)(980) and the f(0)(500) scalar mesons is limited to be less than 17 degrees at 90% confidence level.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 2014, vol. 90, num. 1, p. 012003-1-012003-21
dc.subject	Física nuclear
dc.title	Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays
dc.type	journal article	es_ES
dc.date.updated	2016-04-20T09:37:25Z
dc.identifier.doi	10.1103/PhysRevD.90.012003
dc.identifier.idgrec	099499
dc.rights.accessRights	open access	es_ES