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Measurement of the charged particle multiplicity distribution in hadronic Z decays

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Measurement of the charged particle multiplicity distribution in hadronic Z decays. / ALEPH Collaboration.
In: Physics Letters B, Vol. 273, No. 1-2, 1991, p. 181-192.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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ALEPH Collaboration. Measurement of the charged particle multiplicity distribution in hadronic Z decays. Physics Letters B. 1991;273(1-2):181-192. doi: 10.1016/0370-2693(91)90575-B

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ALEPH Collaboration. / Measurement of the charged particle multiplicity distribution in hadronic Z decays. In: Physics Letters B. 1991 ; Vol. 273, No. 1-2. pp. 181-192.

Bibtex

@article{b0fc1324ee384d7cbfdebfd658b0ffd5,
title = "Measurement of the charged particle multiplicity distribution in hadronic Z decays",
abstract = "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 〈n〉=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 GeV. At 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 framework 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.",
author = "D. Decamp and Alexander Finch and {ALEPH Collaboration}",
year = "1991",
doi = "10.1016/0370-2693(91)90575-B",
language = "English",
volume = "273",
pages = "181--192",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "ELSEVIER SCIENCE BV",
number = "1-2",

}

RIS

TY - JOUR

T1 - Measurement of the charged particle multiplicity distribution in hadronic Z decays

AU - Decamp, D.

AU - Finch, Alexander

AU - ALEPH Collaboration

PY - 1991

Y1 - 1991

N2 - 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 〈n〉=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 GeV. At 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 framework 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.

AB - 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 〈n〉=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 GeV. At 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 framework 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.

U2 - 10.1016/0370-2693(91)90575-B

DO - 10.1016/0370-2693(91)90575-B

M3 - Journal article

VL - 273

SP - 181

EP - 192

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 1-2

ER -