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CHARGED-PARTICLE MULTIPLICITIES OF QUARK AND GLUON JETS IN E(-) ANNIHILATION AT TRISTAN()E()

Authors

NAKABAYASHI K YAMAUCHI M ABE K ADACHI I ADACHI K AOKI M AOKI M EMI K ENOMOTO R FUJII H FUJII K FUJII T FUJIMOTO J FUJIWARA N HAYASHII H HOWELL B IKEDA H INOUE Y ITOH R ITAMI S IWASAKI H IWASAKI M KANEYUKI K KAJIKAWA R KATO S KAWABATA S KICHIMI H KOBAYASHI M KOLTICK D LEVINE I MIYABAYASHI K MIYAMOTO A NAGAI K NAKANO E NITOH O NOGUCHI S OCHI A OCHIAI F OHISHI N OHNISHI Y OHSHIMA Y OKUNO H OKUSAWA T SUGIYAMA A SUZUKI S TAKAHASHI K TAKAHASHI T TANIMORI T TAUCHI T TERAMOTO Y TOMOTO M TSUKAMOTO T UNO S WATANABE Y YAMAMOTO A

Citation

K. Nakabayashi et al., CHARGED-PARTICLE MULTIPLICITIES OF QUARK AND GLUON JETS IN E(-) ANNIHILATION AT TRISTAN()E(), Physics letters. Section B, 413(3-4), 1997, pp. 447-452

Citations number

Journal title

Physics letters. Section B → ACNP

ISSN journal

03702693

Volume

413

Issue

3-4

Year of publication

1997

Pages

447 - 452

Database

ISI

SICI code

0370-2693(1997)413:3-4<447:CMOQAG>2.0.ZU;2-H

Abstract

Charged-particle multiplicity was studied in e(+)e(-) annihilation at root s = 57.8 GeV using the TOPAZ detector at TRISTAN. The average mul tiplicity was [n(ch)] = 17.64 +/- 0.05(stat.) +/- 0.41(syst.). It was found that the multiplicity depends on the thrust (T) of an event. Fro m extrapolating this relation to T = 2/3, the multiplicity for three-f old symmetric events was estimated to be [n(ch)](T=2/3) = 23.50(-1.45) (+1.25). From this, the multiplicity ratio between gluon-and quark-jet was estimated to be r(g/q) = 1.46(-0.13)(+0.09) without any possible bias from jet clustering. (C) 1997 Elsevier Science B.V.