Results 1 to 10 of about 17,639 (237)

Matching parton showers to NLO computations [PDF]

Journal of High Energy Physics, 2005
We give a prescription for attaching parton showers to next-to-leading order (NLO) partonic jet cross sections in electron-positron annihilation. Our method effectively extends to NLO the scheme of Catani, Krauss, Kuhn, and Webber for matching between m ...
Davison E Soper, G. Corcella ., L. Lonnblad, M. Krämer, P. Nason, S. Catani, S. Frixione, S. Frixione, S. Frixione, S. Mrenna, S. Mrenna, See R.K. Ellis, Y.L. Dokshitzer, Zoltán Nagy   +13 more
core   +7 more sources

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.
A Banfi, G Miu, P Nason, Paolo Torrielli, PM Nadolsky, R Frederix, S Alioli, S Catani, S Frixione, S Frixione, S Frixione, S Frixione, S Frixione, Stefano Frixione, T Sjöstrand   +14 more
core   +7 more sources

The automation of next-to-leading order electroweak calculations

Journal of High Energy Physics, 2018
We present the key features relevant to the automated computation of all the leading- and next-to-leading order contributions to short-distance cross sections in a mixed-coupling expansion, with special emphasis on the first subleading NLO term in the ...
R. Frederix, S. Frixione, V. Hirschi, D. Pagani, H.-S. Shao, M. Zaro   +5 more
doaj   +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

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

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

Two-loop master integrals for the leading QCD corrections to the Higgs coupling to a W pair and to the triple gauge couplings ZW W and γ∗ W W

Journal of High Energy Physics, 2017
We compute the two-loop master integrals required for the leading QCD corrections to the interaction vertex of a massive neutral boson X 0, e.g. H, Z or γ∗, with a pair of W bosons, mediated by a SU(2) L quark doublet composed of one massive and one ...
Stefano Di Vita, Pierpaolo Mastrolia, Amedeo Primo, Ulrich Schubert   +3 more
doaj   +1 more source

Functional reduction of Feynman integrals

Journal of High Energy Physics, 2019
A method for reducing Feynman integrals, depending on several kinematic variables and masses, to a combination of integrals with fewer variables is proposed. The method is based on iterative application of functional equations proposed by the author. The
O. V. Tarasov
doaj   +1 more source

Resummed photon spectrum from dark matter annihilation for intermediate and narrow energy resolution

Journal of High Energy Physics, 2019
The annihilation cross section of weakly interacting TeV scale dark matter particles χ 0 into photons is affected by large quantum corrections due to electroweak Sudakov logarithms and the Sommerfeld effect. We extend our previous work on the resummation
M. Beneke, A. Broggio, C. Hasner, K. Urban, M. Vollmann   +4 more
doaj   +1 more source