A Measurement of B Meson Production and Lifetime Using D`− Events in Z0 Decays
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A Measurement of B Meson Production and Lifetime Using D`− Events in Z0 Decays

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A Measurement of B Meson Production and Lifetime Using D`− Events in Z0 Decays

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dc.contributor.author DELPHI Collaboration
dc.contributor.author Allen, Paul
dc.contributor.author Chrin, J. T. M.
dc.contributor.author Cortina Gil, Eduardo
dc.contributor.author Fez Laso, M. D. M. de
dc.contributor.author Ferrer Soria, Antonio
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 Higón Rodríguez, Emilio
dc.contributor.author Lacasta Llácer, Carlos
dc.contributor.author Lozano Bahilo, José Julio
dc.contributor.author Martí García, Salvador
dc.contributor.author Salt Cairols, José
dc.contributor.author Valls Ferrer, Juan Antonio
dc.contributor.author Zúñiga Román, Juan
dc.contributor.author Castillo Giménez, María Victoria
dc.date.accessioned 2016-05-26T12:01:34Z
dc.date.available 2016-05-26T12:01:34Z
dc.date.issued 1993
dc.identifier.uri http://hdl.handle.net/10550/53824
dc.description.abstract A study of B meson decays into D l- X final states is presented. In these events, neutral and charged D mesons originate predominantly from B+ and B0 decays, respectively. The dilution of this correlation due to D** production has been taken into account. From 263700 hadronic Z0 decays collected in 1991 with the DELPHI detector at the LEP collider, 92 D0 --> K- pi+, 35 D+ --> K- pi+ pi+ and 61 D*+ --> D0 pi+ followed by D0 --> K- pi+ or D0 --> K- pi+ pi+ pi-, are found with an associated lepton of the same charge as the kaon. From the D0 l- and D*+ l-, the probability f(d) that a b quark hadronizes into a B- (or B0BAR),meson is found to be 0.44 +/-0.08 +/-0.09, corresponding to a total (B(s) + LAMBDA(b)) hadronization fraction of 0.12(-0.12)+0.24 .By reconstructing the energy of each B meson, the b quark fragmentation is directly measured for the first time. The mean value of the B meson energy fraction is: [X(E)(B)] = 0.695+/-0.015(stat.)+/-0.029(syst.) Reconstructing D-lepton vertices, the following B life-times are measured: tau(B) = 1.27(-0.18)+0.22(stat.)+/-0.15(syst.) ps, where bBAR --> D0 l- X, tau(B) = 1.18(-0.27)+0.39(stat.)+/-0.15(syst.) ps, where BBAR --> D+ l- X, T(B) = 1.19(-0.19)+0.25(stat.)+/-0.15(syst.) ps where BBAR --> D*+ l- X, and an average tau(B) = 1.23(-0.13)+0.14(stat.)+/-0.15(syst.) ps is found. Allowing for decays into D** l- vBAR, the B+ and B0 lifetimes are: tau(B+)= 1.30(0.29)+0.33(stat.)+/-0.15(syst. exp.) +/-0.05(syst. D**) ps, tau(B0)= 1.17(-0.23)+0.29(stat.)+/-0.15(syst. exp.) +/-0.05 (syst. D**) ps, tau(B+)/tau(B0) = 1.11(0.39)+0.51(stat.)+/-0.05(syst. exp.) +/-0.10(syst. D**) ps.
dc.language.iso eng
dc.relation.ispartof Zeitschrift für Physik C-Particles and Fields, 1993, vol. 57, num. 2, p. 181-195
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source DELPHI Collaboration Allen, Paul Chrin, J. T. M. Cortina Gil, Eduardo Fez Laso, M. D. M. de Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gómez Cadenas, Juan José Hernández Rey, Juan José Higón Rodríguez, Emilio Lacasta Llácer, Carlos Lozano Bahilo, José Julio Martí García, Salvador Salt Cairols, José Valls Ferrer, Juan Antonio Zúñiga Román, Juan 1993 A Measurement of B Meson Production and Lifetime Using D`− Events in Z0 Decays Zeitschrift für Physik C-Particles and Fields 57 2 181 195
dc.subject Física nuclear
dc.title A Measurement of B Meson Production and Lifetime Using D`− Events in Z0 Decays
dc.type info:eu-repo/semantics/article
dc.date.updated 2016-05-26T12:01:35Z
dc.identifier.idgrec 070494

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