author={Robert V. Harlander and S. Y. Klein and Mark E. Lipp},
  journal={Comput. Phys. Commun.},

NNLO zero-jettiness beam and soft functions to higher orders in the dimensional-regularization parameter $$\epsilon $$

We present the calculation of the next-to-next-to-leading order (NNLO) zero-jettiness beam and soft functions, up to the second order in the expansion in the dimensional regularization parameter

Opportunities and Challenges of Using Feynman Diagrams with Upper Secondary Students

Particle physics is an exciting subject for high school students, and there have been various approaches on how to introduce the topic in the classroom. Feynman diagrams (FDs) are an often-used form

The gradient flow formulation of the electroweak Hamiltonian

  • Fabian Lange
  • Physics
    Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)
  • 2022
Flavor observables are usually computed with the help of the electroweak Hamiltonian which separates the perturbative from the non-perturbative regime. The Wilson coefficients are calculated

Massive form factors at O( 𝜶 3 𝒔 )

We report on our recent calculation of massive quark form factors using a semi-numerical approach based on series expansions of the master integrals around singular and regular kinematic points and

Drawing Feynman diagrams with GLE

  • A. Grozin
  • Physics, Art
    Computer Physics Communications
  • 2022

$$ \mathcal{CP} $$ structure of the top-quark Yukawa interaction: NLO QCD corrections and off-shell effects

Abstract Since its discovery at the Large Hadron Collider in 2012 the Higgs boson has arguably become the most famous of the Standard Model particles and many measurements have been performed in

NLO QCD corrections to full off-shell production of $$ t\overline{t}Z $$ including leptonic decays

Abstract Motivated by ongoing new physics searches in the top-quark sector at the Large Hadron Collider we report on the calculation of NLO QCD corrections to the Standard Model pp → $$

Effective electroweak Hamiltonian in the gradient-flow formalism

Robert V. Harlander ∗ and Fabian Lange 3, † Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen University, 52056 Aachen, Germany Institut für Theoretische Teilchenphysik, Karlsruhe

Production and decay of the Higgs boson in association with top quarks

We report on the calculation of the next-lo-leading order QCD corrections to Higgs boson production and decay in association with top quarks. We consider leptonic decays of top quarks leading to the



The Theory of Positrons

The problem of the behavior of positrons and electrons in given external potentials, neglecting their mutual interaction, is analyzed by replacing the theory of holes by a reinterpretation of the

Feynman Diagrams: Modeling between Physics and Mathematics

The aim of the present paper is to analyze Feynman diagrams within the context of recent historical and philosophical debates about models in science and against the backdrop of other diagrammatic

TikZ-Feynman: Feynman diagrams with TikZ

MadGraph 5: going beyond

The ideas and the most important developments of the code are described and the capabilities of the MadGraph matrix element generator are illustrated through a few simple phenomenological examples.

FeynEdit - a tool for drawing Feynman diagrams