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Heavy quarkonium production in Z decays

Document type: Articulo

Abstract

We report measurements of the inclusive production of heavy quarkonium states in Z decays based on the analysis of 3.6 million hadronic events collected by the L3 detector at LEP. The measurement of inclusive J production and an improved 95% confidence level upper limit on Υ production are presented. In addition, two independent measurements of the ratio, fp , of prompt J mesons to those from B decay are made using two different isolation cuts to separate prompt J mesons from J mesons produced in the decays of b hadrons. The results are: Br(Z→J+X)=(3.21±0.21(stat.)+0.19−0.28(sys.))×10−3, Br(Z→ϒ(1S)+X)<4.4×10−5, fp=(7.1±2.1(stat.)±1.2(sys.)+1.5−0.8(theo.))×10−2.

General information

Issue date: 29 de abril de 1999
Document language: English
Journal: Physics Letters B; vol. 453, no. 1–2
Origin: Facultad de Ciencias Exactas
ISSN: 0370-2693
Pages: 94-106
xmlui.dri2xhtml.METS-1.0.item-dc-subject: Física ; quarkonium production ; Z decays ; L3 detector
Subjects: Ciencias Exactas

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Created: 12 de julio de 2019
Available since: 12 de julio de 2019
Please, use one of this identificators(URI) for cite o linking this item:
  • http://sedici.unlp.edu.ar/handle/10915/78058
  • https://doi.org/10.1016/S0370-2693(99)00280-4

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    Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)