Recent QCD results above the Z0 from OPAL

被引：0
作者：
Hutchcroft, D [1 ]
机构：
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 1998年 / 64卷
关键词：
D O I：
10.1016/S0920-5632(97)01028-1
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We present some of the OPAL QCD results at root s = 172 GeV, event shape variables, charged particle spectra and multiplicities. We determine the strong coupling strength to be alpha(s)(172 GeV) = 0.093 +/- 0.005(stat.) +/- 0.006(sys.), the mean charged multiplicity to be [n(ch)](172 GeV) = 25.92 +/- 0.56(stat.) +/- 0.81(sys.) and the position of the peak in the xi(p) = In(1/xp) distribution to be xi(D)(172 GeV) = 4.02 +/- 0.04(stat.) +/- 0.02(sys.). The results are compared with data taken at lower centre-of mass energies and analytic QCD and Monte Carlo predictions.
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页码：17 / 21
页数：5
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