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Measurement of gamma(b(b)over-bar)/gamma(had) using impact parameter measurements and lepton identification

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Measurement of gamma(b(b)over-bar)/gamma(had) using impact parameter measurements and lepton identification

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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	Chrin, J. T. M.
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	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	Navas Concha, Sergio
dc.contributor.author	Salt Cairols, José
dc.contributor.author	Valls Ferrer, Juan Antonio
dc.date.accessioned	2014-05-08T11:56:19Z
dc.date.available	2014-05-08T11:56:19Z
dc.date.issued	1995
dc.identifier.citation	DELPHI Collaboration (Abreu, P. Castillo Giménez, María Victoria Ferrer Soria, Antonio Higón Rodríguez, Emilio 1995 Measurement of gamma(b(b)over-bar)/gamma(had) using impact parameter measurements and lepton identification Zeitschrift für Physik C-Particles and Fields 66 3 323 339
dc.identifier.uri	http://hdl.handle.net/10550/35004
dc.description.abstract	The partial decay width of theZ to bb¯quark pairs has been measured by the DELPHI detector at LEP.b-hadrons, containingb-quarks, were tagged by leptons with high transverse momentum relative to the hadron or by tracks with large impact parameters to the primary vertex.The ratio of the numbers of events with a single such tag to those with two tags was used to estimate the efficiency of the method and to reduce the systematic uncertainty. Combining all methods, the value: Γbb¯Γhad=0.2210±0.0033±0.0003(model)±0.0014(Γcc¯) was found, where the third error corresponds to a±8% uncertainty on the cc production width. A maximum likelihood in to the single and di-lepton distributions gave the branching fraction of the decays ofb-quarks to leptons as: BR(b→l)=(11.06±0.39±0.19(model)±0.12(Γcc¯))%.
dc.relation.ispartof	Zeitschrift für Physik C-Particles and Fields, 1995, vol. 66, num. 3, p. 323-339
dc.subject	Partícules (Física nuclear)
dc.subject	Detectors de radiació
dc.title	Measurement of gamma(b(b)over-bar)/gamma(had) using impact parameter measurements and lepton identification
dc.type	journal article	es_ES
dc.date.updated	2014-05-08T11:56:19Z
dc.identifier.doi	10.1007/BF01556358
dc.identifier.idgrec	006567
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1007/BF01556358