S
Stefan Weinzierl
Researcher at University of Mainz
Publications - 11
Citations - 334
Stefan Weinzierl is an academic researcher from University of Mainz. The author has contributed to research in topics: Loop (topology) & Numerical integration. The author has an hindex of 6, co-authored 11 publications receiving 279 citations.
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Numerical NLO QCD calculations
TL;DR: In this paper, an algorithm for numerical calculation of one-loop QCD amplitudes is presented, which consists of subtraction terms, approximating the soft, collinear and ultraviolet divergences of oneloop amplitudes and a method to deform the integration contour for the loop integration into the complex space.
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Causality and Loop-Tree Duality at Higher Loops.
TL;DR: This work relates an l-loop Feynman integral to a sum of phase space integrals, where the integrands are determined by the spanning trees of the original l- loop graph.
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Direct numerical integration for multi-loop integrals
TL;DR: In this paper, a contour deformation in loop momentum space for multi-loop integrals is presented, which can be used to perform the integration numerically without the introduction of Feynman or Schwinger parameters.
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Direct contour deformation with arbitrary masses in the loop
TL;DR: In this paper, the authors presented a method to construct a suitable deformation vector in loop momentum space, when the loop integration is done numerically with the help of the subtraction method.
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Automated computation of spin- and colour-correlated Born matrix elements
TL;DR: In this article, an algorithm for the automated numerical calculation of spin and colour-correlated Born matrix elements in QCD is presented, which is needed for NLO calculations in combination with the subtraction method.