Results 51 to 60 of about 35,945 (210)

Interleaved parton showers and tuning prospects [PDF]

open access: yesJournal of High Energy Physics, 2011
General-purpose Monte Carlo event generators have become important tools in particle physics, allowing the simulation of exclusive hadronic final states. In this article we examine the Pythia 8 generator, in particular focusing on its parton-shower algorithms.
Corke, Richard, Sjöstrand, Torbjörn
openaire   +2 more sources

Measurement of double-parton scattering in inclusive production of four jets with low transverse momentum in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV

open access: yesJournal of High Energy Physics, 2022
A measurement of inclusive four-jet production in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. The transverse momenta of jets within |η| < 4.7 are required to exceed 35, 30, 25, and 20 GeV for the first-, second-, third ...
The CMS collaboration   +2347 more
doaj   +1 more source

Evolution of parton showers and parton distribution functions [PDF]

open access: yesPhysical Review D, 2020
Initial state evolution in parton shower event generators involves parton distribution functions. We examine the probability for the system to evolve from a higher scale to a lower scale without an initial state splitting. A simple argument suggests that this probability, when multiplied by the ratio of the parton distributions at the two scales ...
Zoltán Nagy, Davison E. Soper
openaire   +4 more sources

On the transverse momentum in Z-boson production in a virtuality ordered parton shower [PDF]

open access: yes, 2009
Cross sections for physical processes that involve very different momentum scales in the same process will involve large logarithms of the ratio of the momentum scales when calculated in perturbation theory.
Nagy, Zoltan, Soper, Davison E.
core   +2 more sources

Parton Showers

open access: yes, 2022
DIS2022 conference ...
openaire   +1 more source

Logarithmic accuracy of angular-ordered parton showers [PDF]

open access: yesJournal of High Energy Physics, 2020
Abstract We study the logarithmic accuracy of angular-ordered parton showers by considering the singular limits of multiple emission matrix elements. This allows us to consider different choices for the evolution variable and propose a new choice which has both the correct logarithmic behaviour and improved performance away from ...
Bewick, G   +3 more
openaire   +4 more sources

QCD JETS AND PARTON SHOWERS [PDF]

open access: yesGribov-80 Memorial Volume, 2011
I discuss the calculation of QCD jet rates in e+e- annihilation as a testing ground for parton shower simulations and jet finding algorithms.
openaire   +2 more sources

PanScales showers for hadron collisions: all-order validation

open access: yesJournal of High Energy Physics, 2022
We carry out extensive tests of the next-to-leading logarithmic (NLL) accuracy of the PanScales parton showers, as introduced recently for colour-singlet production in hadron collisions.
Melissa van Beekveld   +6 more
doaj   +1 more source

Coherent parton showers with local recoils [PDF]

open access: yesJournal of High Energy Physics, 2011
We outline a new formalism for dipole-type parton showers which maintain exact energy-momentum conservation at each step of the evolution. Particular emphasis is put on the coherence properties, the level at which recoil effects do enter and the role of transverse momentum generation from initial state radiation.
Plätzer, Simon, Gieseke, Stefan
openaire   +3 more sources

Matching the Nagy-Soper parton shower at next-to-leading order [PDF]

open access: yes, 2015
We present an MC@NLO-like matching of next-to-leading order QCD calculations with the Nagy-Soper parton shower. An implementation of the algorithm within the HELAC-DIPOLES Monte Carlo generator is used to address the uncertainties and ambiguities of the ...
Czakon, M.   +3 more
core   +2 more sources

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