MEASUREMENT OF THE CHARGED-PARTICLE MULTIPLICITY DISTRIBUTION IN HADRONIC-Z DECAYS
ALEPH Collaboration
刊名PHYSICS LETTERS B
1991
卷号273期号:1-2页码:#REF!
学科分类Physics
DOI10.1016/0370-2693(91)90575-B
通讯作者DECAMP, D (reprint author), INST NATL PHYS NUCL & PHYS PARTICULES,CNRS,PHYS PARTICULES LAB,F-74019 ANNEY LE VIEUX,FRANCE.
文章类型Article
英文摘要The charged particle multiplicity distribution of hadronic Z decays was measured on the peak of the Z resonance using the ALEPH detector at LEP. Using a model independent unfolding procedure the distribution was found to have a mean = 20.85 +/- 0.24 and a dispersion D = 6.34 +/- 0.12. Comparison with lower energy data supports the KNO scaling hypothesis in the energy range square-root s = 29-91.25 GeV. At square-root s = 91.25 GeV the shape of the multiplicity distribution is well described by a log-normal distribution, as predicted from a cascading model for multi-particle production. The same model also successfully describes the energy dependence of the mean and width of the multiplicity distribution. A next-to-leading order QCD prediction in the frame-work of the modified leading-log approximation and local parton-hadron duality is found to fit the energy dependence of the mean but not the width of the charged multiplicity distribution, indicating that the width of the multiplicity distribution is a sensitive probe for higher order QCD or non-perturbative effects.
类目[WOS]Physics, Multidisciplinary
收录类别SCI
WOS记录号WOS:A1991GX67500033
引用统计
被引频次:66[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226744
专题中国科学院高能物理研究所_实验物理中心_期刊论文
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ALEPH Collaboration. MEASUREMENT OF THE CHARGED-PARTICLE MULTIPLICITY DISTRIBUTION IN HADRONIC-Z DECAYS[J]. PHYSICS LETTERS B,1991,273(1-2):#REF!.
APA ALEPH Collaboration.(1991).MEASUREMENT OF THE CHARGED-PARTICLE MULTIPLICITY DISTRIBUTION IN HADRONIC-Z DECAYS.PHYSICS LETTERS B,273(1-2),#REF!.
MLA ALEPH Collaboration."MEASUREMENT OF THE CHARGED-PARTICLE MULTIPLICITY DISTRIBUTION IN HADRONIC-Z DECAYS".PHYSICS LETTERS B 273.1-2(1991):#REF!.
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