Comparison of e+e− annihilation with QCD and determination of the strong coupling constant

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Brandelik, R et al. (1980) Comparison of e+e− annihilation with QCD and determination of the strong coupling constant. Physics Letters B, 94 (3). pp. 437-443. ISSN 0370-2693

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Official URL: http://dx.doi.org/10.1016/0370-2693(80)90914-4

DOI: 10.1016/0370-2693(80)90914-4

Abstract

We have analyzed 1113 events of the reaction e+e− → hadrons at CM energies of 12 and 30 GeV in order to make a detailed comparison with QCD. Perturbative effects can be well separated from effects depending on the quark and gluon fragmentation parameters to yield a reliable measurement of the coupling constant αS. At 30 GeV, the result is αS = 0.17 ± 0.02 (statistical) ± 0.03 (systematic). QCD model predictions, using the fragmentation parameters determined along with αS, agree with both gross properties of the final states and with detailed features of the three-jet states.

Item Type:	Article
Subjects:	Q Science > QC Physics
Schools:	School of Applied Sciences
Depositing User:	Sharon Beastall
Date Deposited:	18 Mar 2011 09:33
Last Modified:	23 Mar 2011 11:45
URI:	http://eprints.hud.ac.uk/id/eprint/9871

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