Charged-Particle Multiplicity pp̅ Collisions at √s = 1.8 TeV

Authors

T. Affolder, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Collider Detector at Fermilab Collaboration

Date of this Version

11-19-2001

Comments

Published by American Physical Society. Phys. Rev. Lett. 87, 211804 (2001). http://prl.aps.org. Copyright © 2001 American Physical Society. Permission to use.

Abstract

We report on a measurement of the mean charged-particle multiplicity of jets in dijet events with dijet masses in the range 80-630 GeV/c², produced at the Tevatron in pp̅ collisions with √s= 1.8 TeV and recorded by the Collider Detector at Fermilab. The data are fit to perturbative-QCD calculations carried out in the framework of the modified leading log approximation and the hypothesis of local parton-hadron duality. The fit yields values for two parameters in that framework: the ratio of parton multiplicities in gluon and quark jets, r=N^g-jet _partons/N^q-jet _partons =1.7 ± 0.3, and the ratio of the number of charged hadrons to the number of partons in a jet, K^charged _LPHD ≡ N^charged _hadrons /N_partons =0.57 ± 0.11.