172 citations · 290 across the 25 of their papers we have counts for
11 papers · 1 filter
Multi-Jet Production in Deep Inelastic Scattering with Pythia
Ilkka Helenius, Joni O. Laulainen, Christian T. Preuss
We introduce multi-jet merging for deep inelastic scattering in the Vincia parton shower in the Monte Carlo event generator Pythia 8. Merging combines event samples of different pa…
Multi-Jet Merging in Deep Inelastic Scattering with Pythia
Joni Laulainen, Ilkka Helenius, Christian T. Preuss
We aim to improve the modelling of deep inelastic scattering by implementing multi-jet merging capabilities in Vincia parton shower in the general-purpose Monte Carlo event generat…
Modelling the underlying event in photon-initiated processes
J. M. Butterworth, I. M. Helenius, J. J. Juan Castella +3
Modelling the underlying event in high-energy hadronic collisions is important for physics at colliders. This includes lepton colliders, where low-virtuality photons accompanying t…
Dijet photoproduction and transverse-plane geometry in ultra-peripheral nucleus-nucleus collisions
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present new NLO pQCD predictions for the inclusive photoproduction of dijets in ultra-peripheral (UPC) lead-lead collisions at 5.02 TeV with a realistic impact-parameter depende…
Dimuon production in neutrino-nucleus collisions -- the SIDIS approach
Ilkka Helenius, Hannu Paukkunen, Sami Yrjänheikki
Dimuon production is in many global parton distribution function analyses calculated by assuming that it is proportional to inclusive charm production. As this assumption breaks do…
Global fits of proton PDFs with non-linear corrections from gluon recombination
Pit Duwentäster, Vadim Guzey, Ilkka Helenius +1
We present numerical studies of the leading non-linear corrections to the DGLAP evolution equations of parton distribution functions (PDFs) resulting from gluon recombination, whic…
Les Houches 2023: Physics at TeV Colliders: Standard Model Working Group Report
J. Andersen, B. Assi, K. Asteriadis +81
This report presents a short summary of the activities of the "Standard Model" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 12-30 June, 2023).
Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction
Ilkka Helenius, Marius Utheim
We present an extension to the Pythia Monte Carlo event generator that enables simulations of collisions between a generic hadron beam on a nuclear target with energy variation in…
Photoproduction in general-purpose event generators
Ilkka Helenius, Peter Meinzinger, Simon Plätzer +1
We compare the three general-purpose Monte Carlo event generators, HERWIG, PYTHIA, and SHEPRA for jet photoproduction processes in and collisions. Due to the lower en…
Dimuons from neutrino-nucleus collisions in the semi-inclusive DIS approach
Ilkka Helenius, Hannu Paukkunen, Sami Yrjänheikki
We present a next-to-leading order perturbative QCD calculation of dimuon production in neutrino-nucleus collisions. This process is typically calculated by assuming it to be propo…
Spatial resolution of dijet photoproduction in near-encounter ultraperipheral nuclear collisions
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present next-to-leading order perturbative QCD predictions for inclusive dijet photoproduction in ultra-peripheral nucleus-nucleus collisions (UPCs) within the impact-parameter…