Automated NNLL + NLO resummation for jet-veto cross sections

Becher, Thomas; Frederix, Rikkert; Neubert, Matthias; Rothen, Lorena (2015). Automated NNLL + NLO resummation for jet-veto cross sections. European physical journal. C - particles and fields, 75(4) EDP Sciences 10.1140/epjc/s10052-015-3368-y

Preview

Text art%3A10.1140%2Fepjc%2Fs10052-015-3368-y.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (1MB) | Preview

In electroweak-boson production processes with a jet veto, higher-order corrections are enhanced by logarithms of the veto scale over the invariant mass of the boson system. In this paper, we resum these Sudakov logarithms at next-to-next-to-leading logarithmic accuracy and match our predictions to next-to-leading-order (NLO) fixed-order results. We perform the calculation in an automated way, for arbitrary electroweak final states and in the presence of kinematic cuts on the leptons produced in the decays of the electroweak bosons. The resummation is based on a factorization theorem for the cross sections into hard functions, which encode the virtual corrections to the boson production process, and beam functions, which describe the low-pT emissions collinear to the beams. The one-loop hard functions for arbitrary processes are calculated using the MadGraph5_aMC@NLO framework, while the beam functions are process independent. We perform the resummation for a variety of processes, in particular for W+W− pair production followed by leptonic decays of the W bosons.

Interest & Impact

Downloads

159 since deposited on 28 Aug 2015
24 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item