Determination of |Vub|/|Vcb| with DELPHI at LEP
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Determination of |Vub|/|Vcb| with DELPHI at LEP

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Determination of |Vub|/|Vcb| with DELPHI at LEP

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dc.contributor.author DELPHI Collaboration
dc.contributor.author Alemany Fernández, Reyes
dc.contributor.author Cabrera Urbán, Susana
dc.contributor.author Castillo Giménez, María Victoria
dc.contributor.author Cortina Gil, Eduardo
dc.contributor.author Ferrer Soria, Antonio
dc.contributor.author Fuster Verdú, Juan A.
dc.contributor.author García García, Carmen
dc.contributor.author Gil Botella, Inés
dc.contributor.author Hernández Rey, Juan José
dc.contributor.author Higón Rodríguez, Emilio
dc.contributor.author Martínez Vidal, Fernando
dc.contributor.author Navas Concha, Sergio
dc.contributor.author Salt Cairols, José
dc.date.accessioned 2014-03-29T12:20:53Z
dc.date.available 2014-03-29T12:20:53Z
dc.date.issued 2000
dc.identifier.uri http://dx.doi.org/10.1016/S0370-2693(00)00281-1
dc.identifier.uri http://hdl.handle.net/10550/33800
dc.description.abstract The ratio of the CKM quark-mixing matrix elements |Vub|/|Vcb| has been measured using B hadron semileptonic decays. The analysis uses the reconstructed mass M_X of the secondary hadronic system produced in association with an identified lepton. Since B -> X_u lepton anti-nu transitions are characterised by hadronic masses below those of the D mesons produced in B -> X_c lepton anti-nu transitions, events with a reconstructed value of M_X significantly below the D mass are selected. Further signal enrichments are obtained using the topology of reconstructed decays and hadron identification. A fit to the numbers of decays in the b -> u enriched and depleted samples with M_X above and below 1.6 GeV/c^2 and to the shapes of the lepton energy distribution in the B rest frame gives |Vub|/|Vcb|= 0.103^{+0.011}_{-0.012} (stat.) +/- 0.016 (syst.) +/- 0.010 (model) and, correspondingly, a charmless semileptonic B decay branching fraction of BR(B -> X_u lepton anti-nu) = (1.57 +/- 0.35 (stat.) +/- 0.48 (syst.) +/- 0.27 (model)) x 10^{-3}.
dc.relation.ispartof Physics Letters B, 2000, vol. 478, p. 14-30
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source DELPHI Collaboration Alemany, R. Cabrera Urbán, Susana Castillo Giménez, María Victoria Cortina, E. Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gil, I. Hernández Rey, Juan José Higón Rodríguez, Emilio Martínez Vidal, Fernando Navas, S. Salt Cairols, José 2000 Determination of |Vub|/|Vcb| with DELPHI at LEP Physics Letters B 478 14 30
dc.subject Física nuclear
dc.subject Partícules (Física nuclear)
dc.title Determination of |Vub|/|Vcb| with DELPHI at LEP
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-03-29T12:20:53Z
dc.identifier.doi http://dx.doi.org/10.1016/S0370-2693(00)00281-1
dc.identifier.idgrec 006705

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