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

被引：13

作者：

Pahl, C. ^{[1
,2
]}

Bethke, S. ^{[1
]}

Biebel, O. ^{[3
]}

Kluth, S. ^{[1
]}

Schieck, J. ^{[1
]}

机构：

[1] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[2] Tech Univ Munich, D-85748 Garching, Germany

[3] LMU Munchen, Fak Phys, D-85748 Garching, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 2009年 / 64卷 / 04期

关键词：

ENERGY-DEPENDENCE; BETA-FUNCTION; QCD; ALPHA(S);

D O I：

10.1140/epjc/s10052-009-1167-z

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

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 alpha(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.

引用

页码：533 / 547

页数：15

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