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Power Corrections to Event Shape Variables measured in ep Deep-Inelastic Scattering

K. Rabbertz
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Abstract

Deep-inelastic ep scattering data, taken with the H1 detector at HERA, are used to study event shape variables over a large range of "relevant energy" Q between 7 GeV and 100 GeV. Previously published analysis on thrust, jet broadening, jet mass and C parameter are substantially refined and updated; differential two-jet rates treated as event shapes are presented for the first time. The Q dependence of the mean values is fit to second order calculations of perturbative QCD applying power law corrections proportional to 1/Q^p to account for hadronization effects. The concept of these power corrections is tested by a systematic investigation in terms of a non-perturbative parameter \bar{alpha}_{p-1} and the strong coupling constant.

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K. Rabbertz. 2000-01-06. Power Corrections to Event Shape Variables measured in ep Deep-Inelastic Scattering. https://arxiv.org/abs/hep-ph/0001051

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