Measurement of the semileptonic b branching fractions and average b mixing parameter in Z decays
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Measurement of the semileptonic b branching fractions and average b mixing parameter in Z decays

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Measurement of the semileptonic b branching fractions and average b mixing parameter in Z decays

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dc.contributor.author DELPHI Collaboration
dc.contributor.author Castillo Giménez, María Victoria
dc.contributor.author Ferrer Soria, Antonio
dc.contributor.author Higón Rodríguez, Emilio
dc.contributor.author Alemany Fernández, Reyes
dc.contributor.author Cabrera Urbán, Susana
dc.contributor.author Cortina Gil, Eduardo
dc.contributor.author Costa Mezquita, María José
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 Martí García, Salvador
dc.contributor.author Oyanguren Campos, Arantza
dc.contributor.author Salt Cairols, José
dc.contributor.author Tortosa Martínez, Pablo
dc.date.accessioned 2014-04-01T11:00:01Z
dc.date.available 2014-04-01T11:00:01Z
dc.date.issued 2001
dc.identifier.uri http://dx.doi.org/10.1007/s100520100690
dc.identifier.uri http://hdl.handle.net/10550/33927
dc.description.abstract The semileptonic branching fractions for primary and cascade b decays {BR}(brightarrow ell^-), BR(brightarrow crightarrow ell^+) and BR(brightarrowbar crightarrow ell^- were measured in hadronic Z decays collected by the DELPHI experiment at LEP. The sample was enriched in b decays using the lifetime information and various techniques were used to separate leptons from direct or cascade b decays. By fitting the momentum spectra of di-leptons in opposite jets, the average b mixing parameter bar{χ} was also extracted. The following results have been obtained: begin{eqnarray*} BR({brightarrow ell^- ell^-}) &=& (10.70±0.08 (stat)±0.21(syst)_{+0.44}^{-0.30}(model))% BR({brightarrow crightarrow ell^+})&=& (7.98±0.22 (stat)±0.21(syst)^{+0.14}_{-0.20}(model))% BR({brightarrow bar c rightarrow ell^-})&=& (1.61±0.20 (stat)±0.17(syst)^{+0.30}_{-0.44}(model))% bar{χ} &=& 0.127±0.013 (stat)±0.005(syst)±0.004(model) end{eqnarray*}
dc.relation.ispartof European Physical Journal C, 2001, vol. 20, num. 3, p. 455-478
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source DELPHI Collaboration Castillo Giménez, María Victoria Ferrer Soria, Antonio Higón Rodríguez, Emilio 2001 Measurement of the semileptonemic b branching fractions and average b mixing parameter in Z decays European Physical Journal C 20 3 455 478
dc.subject Física nuclear
dc.subject Partícules (Física nuclear)
dc.title Measurement of the semileptonic b branching fractions and average b mixing parameter in Z decays
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-04-01T11:00:01Z
dc.identifier.doi http://dx.doi.org/10.1007/s100520100690
dc.identifier.idgrec 006739

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