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Abstract The prediction of the effective electroweak mixing angle sin 2 θ eff b in the Standard Model at two-loop accuracy has now been completed by the first calculation of the bosonic two-loop… (More)

We introduce techniques to treat numerically Mellin-Barnes integrals in physical regions, which arise in the need of the computation of Feynman integrals for the electroweak two-loop corrections to… (More)

Deutsches Elektronen-Synchrotron, DESY,Platanenallee 6, 15738 Zeuthen, GermanyTwo criteria for planarity of a Feynman diagram upon its propagators(momentum ows) are presented. Instructive Mathematica… (More)

Mellin-Barnes (MB) techniques applied to integrals emerging in particle physics perturbative calculations are summarized. New versions of AMBRE packages which construct planar and nonplanar MB… (More)

- Johannes Blumlein, Ievgen Dubovyk, +4 authors Christopher Schneider
- 2014

The construction of Mellin-Barnes (MB) representations for non-planar Feynman diagrams and the summation of multiple series derived from general MB representations are discussed. A basic version of a… (More)

- Abdessamad Abada, Muhammad Waqas, +497 authors Heather Gray
- 2019

The one-loop corrections to the weak mixing angle $\sin^2\theta_{eff}^b$ derived from the $Z{\bar b}b$ vertex, are known since 1985. It took another 30 years to calculate the complete electroweak… (More)

Abstract This article presents results for the last unknown two-loop contributions to the Z -boson partial widths and Z -peak cross-section. These are the so-called bosonic electroweak two-loop… (More)

During the last several years remarkable progress has been made in numerical calculations of dimensionally regulated multi-loop Feynman diagrams using Mellin-Barnes (MB) representations. The… (More)

- Ievgen Dubovyk, O. Shebeko
- 2010

The clothing procedure, put forward in quantum field theory (QFT) by Greenberg and Schweber, is applied for the description of nucleon–nucleon (N −N) scattering. We consider pseudoscalar (π and η),… (More)