NLO Event Generation for Chargino Production at the ILC

Details NLO Event Generation for Chargino Production at the ILC NLO Event Generation for Chargino Production at the ILC

2006-07-11

arxiv.org/abs/hep-ph/0607127v2

Eur.Phys.J.C48:389-400,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, version to appear in Eur.Phys.Jour.C

Scientific paper

10.1140/epjc/s10052-006-0048-y

We present a Monte-Carlo event generator for simulating chargino pair-production at the International Linear Collider (ILC) at next-to-leading order in the electroweak couplings. By properly resumming photons in the soft and collinear regions, we avoid negative event weights, so the program can simulate physical (unweighted) event samples. Photons are explicitly generated throughout the range where they can be experimentally resolved. Inspecting the dependence on the cutoffs separating the soft and collinear regions, we evaluate the systematic errors due to soft and collinear approximations. In the resummation approach, the residual uncertainty can be brought down to the per-mil level, coinciding with the expected statistical uncertainty at the ILC.

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