Study of quark fragmentation ine+e−annihilation at 29 GeV: Charged-… | Zendy

M. Derrick | Zendy; K. K. Gan | Zendy; P. Kooijman | Zendy; J. S. Loos | Zendy; B. Musgrave | Zendy; L. E. Price | Zendy; J. Repond | Zendy; J. Schlereth | Zendy; K. Sugano | Zendy; J. M. Weiss | Zendy; D. Wood | Zendy; G. Baranko | Zendy; D. Blockus | Zendy; B. Brabson | Zendy; J.-M. Brom | Zendy; S. W. Gray | Zendy; C. K. Jung | Zendy; H. A. Neal | Zendy; H. Ogren | Zendy; D. R. Rust | Zendy; M. Valdata-Nappi | Zendy; C. Akerlof | Zendy; G. Bonvicini | Zendy; J. Chapman | Zendy; D. Errede | Zendy; N. Harnew | Zendy; P. Kesten | Zendy; D. I. Meyer | Zendy; D. Nitz | Zendy; A. A. Seidl | Zendy; R. P. Thun | Zendy; T. Trinko | Zendy; M. Willutzky | Zendy; S. Abachi | Zendy; P. Baringer | Zendy; U. Mallik | Zendy; I. Beltrami | Zendy; Ben Bylsma | Zendy; R. DeBonte | Zendy; F. Loeffler | Zendy; E. H. Low | Zendy; R. L. McIlwain | Zendy; D. H. Miller | Zendy; C. R. Ng | Zendy; L. K. Rangan | Zendy; E. I. Shibata | Zendy; B. Cork | Zendy

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Study of quark fragmentation ine+e−annihilation at 29 GeV: Charged-…

Author(s) -

M. Derrick,

K. K. Gan,

P. Kooijman,

J. S. Loos,

B. Musgrave,

L. E. Price,

J. Repond,

J. Schlereth,

K. Sugano,

J. M. Weiss,

D. Wood,

G. Baranko,

D. Blockus,

B. Brabson,

J.-M. Brom,

S. W. Gray,

C. K. Jung,

H. A. Neal,

H. Ogren,

D. R. Rust,

M. Valdata-Nappi,

C. Akerlof,

G. Bonvicini,

J. Chapman,

D. Errede,

N. Harnew,

P. Kesten,

D. I. Meyer,

D. Nitz,

A. A. Seidl,

R. P. Thun,

T. Trinko,

M. Willutzky,

S. Abachi,

P. Baringer,

U. Mallik,

I. Beltrami,

Ben Bylsma,

R. DeBonte,

F. Loeffler,

E. H. Low,

R. L. McIlwain,

D. H. Miller,

C. R. Ng,

L. K. Rangan,

E. I. Shibata,

B. Cork

Publication year - 1986

Publication title -

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Language(s) - English

Resource type - Journals

eISSN - 1089-4918

pISSN - 0556-2821

DOI - 10.1103/physrevd.34.3304

Subject(s) - physics , hadron , multiplicity (mathematics) , particle physics , annihilation , sphericity , elementary particle , charged particle , nuclear physics , atomic physics , geometry , ion , mathematics , quantum mechanics , astronomy

This paper presents the charged-particle multiplicity distributions for e+e- annihilation at s =29 GeV measured in the High Resolution Spectrometer. The data, which correspond to an integrated luminosity of 185 pb-1, were obtained at the SLAC e+e- storage ring PEP. The techniques used to correct the observed prong numbers are discussed. The multiplicity distribution of the charged particles has a mean value n=12.87±0.03±0.30, a dispersion D2=3.67±0.02±0.18, and an f2 moment of 0.60±0.02±0. 18. Results are also presented for a two-jet sample selected with low sphericity and aplanarity. The charged-particle distributions are almost Poissonian and narrower than have been reported by other e+e- experiments in this energy range. The mean multiplicity increases with the event sphericity, and for the sample of threefold-symmetric three-jet events, a value of n=16.3±0.3±0.7 is found. No correlation is observed between the multiplicities in the two hemispheres when the events are divided into two jets by a plane perpendicular to the thrust axis. This result is in contrast with the situation in soft hadronic collisions, where a strong forward-backward correlation is measured. For the single jets, a mean multiplicity of 6.43±0.02±0.15 and a dispersion value of D2=2.55±0.02±0.13 are found. These values give further support to the idea of independent jet fragmentation. The multiplicity distributions are well fit by the negative-binomial distribution. The semi-inclusive rapidity distributions are presented. Comparisons are made to the measurements of charged-particle multiplicities in hadron-hadron and lepton-nucleon collisions. © 1986 The American Physical Society

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