QCD studies with e+e− annihilation data at 172-189 GeV

Kartvelishvili, Vakhtang (2000) QCD studies with e+e− annihilation data at 172-189 GeV. European Physical Journal C: Particles and Fields, 16 (2). pp. 185-210. ISSN 1434-6044

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Abstract

We have studied hadronic events from e+e− annihilation data at centre-of-mass energies of √s= 172, 183 and 189 GeV. The total integrated luminosity of the three samples, measured with the OPAL detector, corresponds to 250 pb−1. We present distributions of event shape variables, charged particle multiplicity and momentum, measured separately in the three data samples. From these we extract measurements of the strong coupling αsαs , the mean charged particle multiplicity ⟨nch⟩ and the peak position ξ0 in the ξp=ln(1/xp) distribution. In general the data are described well by analytic QCD calculations and Monte Carlo models. Our measured values of αs, ⟨nch⟩ and ξ0 are consistent with previous determinations at √s=MZ0.

Item Type:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
ID Code:
82858
Deposited By:
Deposited On:
14 Nov 2016 15:16
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Aug 2020 03:25