Results 41 to 50 of about 60,569 (196)

Multiplicative-accumulative matching of NLO calculations with parton showers

open access: yesJournal of High Energy Physics, 2022
We propose a new approach for combining next-to-leading order (NLO) and parton shower (PS) calculations so as to obtain three core features: (a) applicability to general showers, as with the MC@NLO and POWHEG methods; (b) positive-weight events, as with ...
Paolo Nason, Gavin P. Salam
doaj   +1 more source

Measurement of the low-mass Drell-Yan differential cross section at √s = 7 TeV using the ATLAS detector [PDF]

open access: yes, 2014
The differential cross section for the process Z/γ ∗ → ℓℓ (ℓ = e, μ) as a function of dilepton invariant mass is measured in pp collisions at s√ = 7 TeV at the LHC using the ATLAS detector.
Ramos, Jam   +999 more
core   +4 more sources

Herwig 7.2 release note

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
A new release of the Monte Carlo event generator Herwig (version 7.2) is now available. This version introduces a number of improvements over the major version 7.0, notably: multi-jet merging with the dipole shower at LO and NLO QCD; spin correlations in
Johannes Bellm   +18 more
doaj   +1 more source

An analytic initial-state parton shower [PDF]

open access: yesJournal of High Energy Physics, 2012
Abstract We present a new algorithm for an analytic parton shower. While the algorithm for the final-state shower has been known in the literature, the construction of an initialstate shower along these lines is new. The aim is to have a parton shower algorithm for which the full analytic form of the probability distribution for ...
Kilian, W.   +3 more
openaire   +4 more sources

Momentum conservation and unitarity in parton showers and NLL resummation

open access: yesJournal of High Energy Physics, 2018
We present a systematic study of differences between NLL resummation and parton showers. We first construct a Markovian Monte-Carlo algorithm for resummation of additive observables in electron-positron annihilation.
Stefan Höche   +2 more
doaj   +1 more source

NNLOPS description of the H→ b b ¯ $$ b\overline{b} $$ decay with MiNLO

open access: yesJournal of High Energy Physics, 2020
We present an event generator that describes the Higgs boson decay into b-quarks at next-to-next-to-leading-order (NNLO) in QCD and allows for a consistent matching to parton shower.
Wojciech Bizoń   +2 more
doaj   +1 more source

Hadronic decays of Higgs boson at NNLO matched with parton shower

open access: yesJournal of High Energy Physics, 2021
We present predictions for hadronic decays of the Higgs boson at next-to-next-to-leading order (NNLO) in QCD matched with parton shower based on the POWHEG framework.
YaLu Hu   +3 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

Measurement of the electroweak production of dijets in association with a Z-boson and distributions sensitive to vector boson fusion in proton-proton collisions at √s = 8 TeV using the ATLAS detector [PDF]

open access: yes, 2014
Contains fulltext : 127825.pdf (Publisher’s version ) (Open Access) Contains fulltext : 127825.pdf (Author’s version preprint ) (Open ...
G. Khoriauli   +999 more
core   +6 more sources

Reweighting a parton shower using a neural network: the final-state case

open access: yesJournal of High Energy Physics, 2019
The use of QCD calculations that include the resummation of soft-collinear logarithms via parton-shower algorithms is currently not possible in PDF fits due to the high computational cost of evaluating observables for each variation of the PDFs ...
Enrico Bothmann, Luigi Del Debbio
doaj   +1 more source

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