6533b821fe1ef96bd127c1b3

RESEARCH PRODUCT

QCD NLO with Powheg matching and top threshold matching in WHIZARD

Bijan ChokoufeWolfgang KilianJürgen ReuterChristian WeissFabian BachMaximilian Stahlhofen

subject

threshold [top]electronParticle physicsleptonFOS: Physical sciencespair production [top]relativistic [correction]phase spaceHigh Energy Physics - Phenomenology (hep-ph)quantum chromodynamicsResummationMonte Carlototal cross sectionEvent generatorQuantum chromodynamicsPhysicselectroweak interactionHigh Energy Physics::PhenomenologyElectroweak interactionObservableMassless particleHigh Energy Physics - PhenomenologyPair productionproduction [top]interfaceHigh Energy Physics::Experimentthreshold [resummation]Lepton

description

We present the status of the automation of NLO processes within the event generator WHIZARD. The program provides an automated FKS subtraction and phase space integration over the FKS regions, while the (QCD) NLO matrix element is accessed via the Binoth Les Houches Interface from an externally linked one-loop program. Massless and massive test cases and validation are shown for several e+e- processes. Furthermore, we discuss work in progress and future plans. The second part covers the matching of the NRQCD prediction with NLL threshold resummation to the NLO continuum top pair production at lepton colliders. Both the S-wave and P-wave production of the top pair are taken into account in the resummation. The inclusion in WHIZARD allows to study more exclusive observables than just the total cross section and automatically accounts for important electroweak and relativistic corrections in the threshold region.

yearjournalcountryeditionlanguage
2016-08-04Proceedings of 12th International Symposium on Radiative Corrections (Radcor 2015) and LoopFest XIV (Radiative Corrections for the LHC and Future Colliders) — PoS(RADCOR2015)
https://doi.org/10.22323/1.235.0088