Event Shapes and Power Corrections in ep DIS
Abstract
Deep-inelastic ep scattering data, taken with the H1 detector at HERA, are used to study the event shape variables thrust, jet broadening, jet mass, C parameter, and two kinds of differential two-jet rates over a large range of ``relevant energy'' Q between 7 GeV and 100 GeV. The Q dependence of the mean values is fit to second order calculations of perturbative QCD applying power law corrections proportional to 1/Qp to account for hadronization effects. The concept of these power corrections is tested by a systematic investigation in terms of a non-perturbative parameter alphap-1 and the strong coupling constant.
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