Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 13: QCD (Theorie) 3
T 13.5: Vortrag
Mittwoch, 6. März 2013, 17:45–18:00, WIL-A120
Four jet production at next-to-leading order for the Large Hadron Collider — •Benedikt Biedermann1, Peter Uwer1, Simon Badger2, and Valery Yundin2 — 1Humboldt-Universität zu Berlin — 2The Niels Bohr Insitute, Copenhagen
Results for four jet production at the LHC at next-to-leading order accuracy are presented. We study the inclusive four jet cross section as well as a variety of differential distributions in the five flavour scheme. We find large negative corrections at next-to-leading order reducing the leading-order results by around 40-50%. The virtual corrections are computed with our publicly available program NJet, an implementation of generalised unitarity which is very well suited for processes with many particles in the final state. We show that a dynamical phase space dependent scale choice leads to a remarkably constant K-factor. Besides the physical results, we discuss also the origin of the large next-to-leading order corrections and give an outlook on future perspectives.