Unweighted event generation in hadronic WZ production at order(alpha_S)

Details Unweighted event generation in hadronic WZ production at order(alpha_S) Unweighted event generation in hadronic WZ production at order(alpha_S)

2000-11-16

arxiv.org/abs/hep-ph/0011206v1

Phys.Rev. D63 (2001) 053011

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 4 figures

Scientific paper

10.1103/PhysRevD.63.053011

We present an algorithm for unweighted event generation in the partonic process pp -> WZ (j) with leptonic decays at next-to-leading order in alpha_S. Monte Carlo programs for processes such as this frequently generate events with negative weights in certain regions of phase space. For simulations of experimental data one would like to have unweighted events only. We demonstrate how the phase space from the matrix elements can be combined to achieve unweighted event generation using a second stage Monte Carlo integration over a volume of real emissions (jets). Observable quantities are kept fixed in the laboratory frame throughout the integration. The algorithm is applicable to a broader class of processes and is CPU intensive.

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