A general algorithm to generate unweighted events for next-to-leading order calculations in electron-positron annihilation

Details A general algorithm to generate unweighted events for next-to-leading order calculations in electron-positron annihilation A general algorithm to generate unweighted events for next-to-leading order calculations in electron-positron annihilation

2001-06-14

arxiv.org/abs/hep-ph/0106146v2

JHEP 0108 (2001) 028

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, published version

Scientific paper

10.1088/1126-6708/2001/08/028

Given a next-to-leading order calculation, we show how to set up a computer program, which generates a sequence of unweighted momentum configurations, each configuration containing either n or n+1 four-vectors, such that for any infrared safe observable the average over these configurations coincides with the NLO calculation up to errors of order y_res. The core of the algorithm is a method to combine real emission and virtual corrections on a point-by-point basis in hard phase space. The algorithm can be implemented on top of existing NLO calculations.

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