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

Stefan Weinzierl | Zendy

Open Access

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

Author(s) -

Stefan Weinzierl

Publication year - 2001

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2001/08/028

Subject(s) - point (geometry) , algorithm , observable , set (abstract data type) , annihilation , sequence (biology) , computer science , order (exchange) , basis (linear algebra) , physics , electron , momentum (technical analysis) , positron , positron annihilation , phase space , space (punctuation) , mathematics , particle physics , nuclear physics , quantum mechanics , geometry , operating system , finance , biology , economics , genetics , programming language

Given a next-to-leading order calculation, we show how to set up a computerprogram, which generates a sequence of unweighted momentum configurations, eachconfiguration containing either n or n+1 four-vectors, such that for anyinfrared safe observable the average over these configurations coincides withthe NLO calculation up to errors of order y_res. The core of the algorithm is amethod to combine real emission and virtual corrections on a point-by-pointbasis in hard phase space. The algorithm can be implemented on top of existingNLO calculations.Comment: 19 pages, published versio

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