Resummed event-shape variables in DIS

Details Resummed event-shape variables in DIS Resummed event-shape variables in DIS

2002-08-07

arxiv.org/abs/hep-ph/0208073v1

JHEP0208:032,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

41 pages

Scientific paper

10.1088/1126-6708/2002/08/032

We complete our study of resummed event-shape distributions in DIS by presenting results for the class of observables that includes the current jet mass, the C-parameter and the thrust with respect to the current-hemisphere thrust axis. We then compare our results to data for all observables for which data exist, fitting for alpha_s and testing the universality of non-perturbative 1/Q effects. A number of technical issues arise, including the extension of the concept of non-globalness to the case of discontinuous globalness; singularities and non-convergence of distributions other than in the Born limit; methods to speed up fixed-order Monte Carlo programs by up to an order of magnitude, relevant when dealing with many x and Q points; and the estimation of uncertainties on the predictions.

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