Results 1 to 10 of about 17,573 (205)

Matching NLO QCD computations with PYTHIA using MC@NLO [PDF]

Journal of High Energy Physics, 2010
We present the matching between a next-to-leading order computation in QCD and the PYTHIA parton shower Monte Carlo, according to the MC@NLO formalism. We study the case of initial-state radiation, and consider in particular single vector boson hadroproduction.
Torrielli, Paolo, Frixione, Stefano
openaire   +6 more sources

Matching parton showers to NLO computations [PDF]

Journal of High Energy Physics, 2005
45 pages, new introduction, more detailed discussion of the Sudakov ...
Nagy, Zoltan, Soper, Davison E.
openaire   +4 more sources

Master integrals for bipartite cuts of three-loop photon self energy

Journal of High Energy Physics, 2021
We calculate the master integrals for bipartite cuts of the three-loop propagator QED diagrams. These master integrals determine the spectral density of the photon self energy.
R. N. Lee, A. I. Onishchenko
doaj   +1 more source

aMCfast: automation of fast NLO computations for PDF fits [PDF]

Journal of High Energy Physics, 2014
36 pages, 10 ...
Valerio Bertone, Rikkert Frederix, Stefano Frixione, Juan Rojo, Mark Sutton   +4 more
openaire   +4 more sources

Matching NLO QCD computations and parton shower simulations [PDF]

Journal of High Energy Physics, 2002
69 pages Latex; 16 figures included.
Frixione, Stefano, Webber, Bryan R
openaire   +2 more sources

Renormalization of the flavor-singlet axial-vector current and its anomaly in dimensional regularization

Journal of High Energy Physics, 2021
The renormalization constant Z J of the flavor-singlet axial-vector current with a non-anticommuting γ 5 in dimensional regularization is determined to order α s 3 $$ {\alpha}_s^3 $$ in QCD with massless quarks.
Taushif Ahmed, Long Chen, Michał Czakon
doaj   +1 more source

Exact results for Z m OS $$ {Z}_m^{\mathrm{OS}} $$ and Z 2 OS $$ {Z}_2^{\mathrm{OS}} $$ with two mass scales and up to three loops

Journal of High Energy Physics, 2020
We consider the on-shell mass and wave function renormalization constants Z m OS $$ {Z}_m^{\mathrm{OS}} $$ and Z 2 OS $$ {Z}_2^{\mathrm{OS}} $$ up to three-loop order allowing for a second non-zero quark mass.
Matteo Fael, Kay Schönwald, Matthias Steinhauser   +2 more
doaj   +1 more source

Efficiency improvements for the numerical computation of NLO corrections [PDF]

Journal of High Energy Physics, 2012
In this paper we discuss techniques, which lead to a significant improvement of the efficiency of the Monte Carlo integration, when one-loop QCD amplitudes are calculated numerically with the help of the subtraction method and contour deformation. The techniques discussed are: holomorphic and non-holomorphic division into sub-channels, optimisation of ...
Becker, Sebastian, Reuschle, Christian, Weinzierl, Stefan   +2 more
openaire   +2 more sources

The partonic structure of the electron at the next-to-leading logarithmic accuracy in QED

Journal of High Energy Physics, 2020
By working in QED, we obtain the electron, positron, and photon Parton Distribution Functions (PDFs) of the unpolarised electron at the next-to-leading logarithmic accuracy.
V. Bertone, M. Cacciari, S. Frixione, G. Stagnitto   +3 more
doaj   +1 more source

Improving colour computations in MadGraph5_aMC@NLO and exploring a $$1/N_c$$ expansion

The European Physical Journal C, 2022
AbstractIn this paper, we present an extension of which is able to evaluate tree-level QCD matrix-elements up to $$2\rightarrow 6$$ 2 → 6 (one more particle than before).
Andrew Lifson, Olivier Mattelaer
openaire   +2 more sources