J / psi production in the hadronic decays of the Z
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J / psi production in the hadronic decays of the Z

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J / psi production in the hadronic decays of the Z

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dc.contributor.author DELPHI Collaboration
dc.contributor.author Higón Rodríguez, Emilio
dc.contributor.author Cases Ruiz, Ramón
dc.contributor.author Castillo Giménez, María Victoria
dc.contributor.author Ferrer Soria, Antonio
dc.contributor.author Cortina Gil, Eduardo
dc.contributor.author Chrin, J. T. M.
dc.contributor.author Fez Laso, M. D. M. de
dc.contributor.author Fuster Verdú, Juan A.
dc.contributor.author García García, Carmen
dc.contributor.author Gómez Cadenas, Juan José
dc.contributor.author Hernández Rey, Juan José
dc.contributor.author Hernando Morata, José Ángel
dc.contributor.author Lacasta Llácer, Carlos
dc.contributor.author Lozano Bahilo, José Julio
dc.contributor.author Martínez Vidal, Fernando
dc.contributor.author Martí García, Salvador
dc.contributor.author Salt Cairols, José
dc.contributor.author Valls Ferrer, Juan Antonio
dc.date.accessioned 2014-05-06T09:37:01Z
dc.date.available 2014-05-06T09:37:01Z
dc.date.issued 1994
dc.identifier.uri http://hdl.handle.net/10550/34917
dc.description.abstract J/ψ mesons have been reconstructed from their decay to μ+μ− and e+e−, using the data collected by the DELPHI experiment during 1991 and 1992 at the LEP collider. From about 1 million hadronic Z decays 153 ± 17 J/ψ were found, 5.4 ± 2.3 ψ′ were obtained in the channel J/ψ (→μ+μ−)π+π− and 6.4 ± 2.7 χc in the channel J/ψ ( → μ+μ−)γ. As the dominant source of Jψ mesons is from bquarks, the following branching ratios: Br(b → J/ψX) = (1.12 ± 0.12 (stat) ± 0.10 (syst.))%, Br(b → ψ′ X) = (0.48 ± 0.22 (stat.± 0.10 (syst.))%, Br(b → χc1X) = (1.4 ± 0.6 (stat.)−0.2+0.4 (syst.))% were measured. From the proper time distribution of the J/ψ sample, the average lifetime of b-hadrons decaying into J/ψ was found to be: τB = 1.50−0.21+0.24 (stat.) ± 0.03 (syst.) ps. A search for completely reconstructed B meson decays to final states including a J/ψ gave a signal of 15 ± 5 events.
dc.relation.ispartof Physics Letters B, 1994, vol. 341, num. 1, p. 109-122
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source DELPHI collaboration Castillo Giménez, María Victoria Cases Ruiz, Manuel Ramón Ferrer Soria, Antonio Higón Rodríguez, Emilio 1994 J / psi production in the hadronic decays of the Z Physics Letters B 341 1 109 122
dc.subject Partícules (Física nuclear)
dc.title J / psi production in the hadronic decays of the Z
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-05-06T09:37:01Z
dc.identifier.doi http://dx.doi.org/10.1016/0370-2693(94)01385-3
dc.identifier.idgrec 006560

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