Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 37: Theorie: QCD / Top-Physik / Elektroschwache Physik

T 37.7: Vortrag

Dienstag, 20. März 2018, 18:00–18:15, Z6 - SR 1.013

Automation of QCD at NLO: pp → Zj+X as a toy example — •Pascal Stienemeier, Jürgen Reuter, Vincent Rothe, and Christian Weiss — DESY Theory Group, Notkestr. 85, D-22607 Hamburg, Germany

In order to cope with increased experimental accuracy of the LHC era, the accuracy of theoretical predictions has to be increased as well. For this task, sophisticated tools for automated computation, namely matrix-element generators and Monte-Carlo event generators, have to take next-to-leading order effects into account.

A hadronic initial state like protons at the LHC however incorporates computational challenges such as infrared initial state divergences. A possibility to substract these divergencies is the Frixione-Kunszt-Signer (FKS) subtraction scheme whose implementation in Whizard is currently being validated.

In this talk I will show details of the implementation and validation of the FKS subtraction, particularly the initial state splittings and regions, using as a prime example computed by Whizard the simplest process where all these components are needed, namely pp → Zj + X at QCD NLO.