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Measurement of the average lifetime of b-hadrons in Z decays

Document type: Articulo

Abstract

We present a measurement of the average b-hadron lifetime t at the eqey collider LEP. Using hadronic Z decays b collected in the period from 1991 to 1994, two independent analyses have been performed. In the first one, the b-decay position is reconstructed as a secondary vertex of hadronic b-decay particles. The second analysis is an updated measurement of t using the impact parameter of leptons with high momentum and high transverse momentum. The combined result is τb=[1549±9(stat)±15(syst)]fs. In addition, we measure the average charged b-decay multiplicity 〈nb〉and the normalized average b-energy 〈xE〉b at LEP to be 〈nb〉=4.90±0.04(stat)±0.11(syst),〈xE〉b=0.709±0.004(stat+syst).

General information

Issue date: 1 de enero de 1998
Document language: Spanish
Journal: Physics Letters B; vol. 416, no. 1–2
Origin: Facultad de Ciencias Exactas
ISSN: 0370-2693
Pages: 220-232
xmlui.dri2xhtml.METS-1.0.item-dc-subject: Física ; b-hadron lifetime ; colider LEP ; Z decays
Subjects: Ciencias Exactas

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Created: 10 de julio de 2019
Available since: 10 de julio de 2019
Please, use one of this identificators(URI) for cite o linking this item:
  • http://sedici.unlp.edu.ar/handle/10915/77896
  • https://doi.org/10.1016/S0370-2693(97)01379-8

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