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Tests of analytical hadronisation models using event shape moments in e+e− annihilation

  • Regular Article - Experimental Physics
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Abstract

Predictions of analytical models for hadronisation, namely the dispersive model, the shape function and the single dressed gluon approximation, are compared with moments of hadronic event shape distributions measured in e+e− annihilation at centre-of-mass energies between 14 and 209 GeV. In contrast to Monte Carlo models for hadronisation, analytical models require to adjust only two universal parameters, the strong coupling and a second quantity parametrising non-perturbative corrections. The extracted values of α S are consistent with the world average and competitive with previous measurements. The variance of event shape distributions is compared with predictions given by some of these models. Limitations of the models, probably due to unknown higher order corrections, are demonstrated and discussed.

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Authors and Affiliations

  1. Max-Planck-Institut für Physik, Föhringer Ring 6, 80805, Munich, Germany

    C. Pahl, S. Bethke, S. Kluth & J. Schieck

  2. Excellence Cluster Universe, Technische Universität München, Boltzmannstr. 2, 85748, Garching, Germany

    C. Pahl

  3. Fakultät für Physik, LMU München, Am Coulombwall 1, 85748, Garching, Germany

    O. Biebel

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  1. C. Pahl
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  2. S. Bethke
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  3. O. Biebel
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  4. S. Kluth
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  5. J. Schieck
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Correspondence to C. Pahl.

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Pahl, C., Bethke, S., Biebel, O. et al. Tests of analytical hadronisation models using event shape moments in e+e− annihilation. Eur. Phys. J. C 64, 533–547 (2009). https://doi.org/10.1140/epjc/s10052-009-1167-z

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  • DOI: https://doi.org/10.1140/epjc/s10052-009-1167-z

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