Elsevier

Nuclear Physics B

Volume 218, Issue 2, 6 June 1983, Pages 269-288
Nuclear Physics B

The influence of fragmentation models on the determination of the strong coupling constant in e+e annihilation into hadrons

https://doi.org/10.1016/0550-3213(83)90364-4Get rights and content

Abstract

Hadronic events obtained with the CELLO detector at PETRA were compared with first-order QCD predictions using two different models for the fragmentation of quarks and gluons, the Hoyer model and the Lund model. Both models are in reasonable agreement with the data, although they do not completely reproduce the details of many distributions. Several methods have been applied to determine the strong coupling constant αS. Although within one model the value of αS varies by 20% among the different methods, the values determined using the Lund model are 30% or more larger (depending on the method used) than the values determined with the Hoyer model. Our results using the Hoyer model are in agreement with previous results based on this approach.

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Visitor from the Institute of High Energy Physics, Chinese Academy of Science, Peking, People's Republic of China.

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