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pro vyhledávání: '"Henn, Johannes"'
This open access book bridges a gap between introductory Quantum Field Theory (QFT) courses and state-of-the-art research in scattering amplitudes. It covers the path from basic definitions of QFT to amplitudes, which are relevant for processes in th
Externí odkaz:
https://library.oapen.org/handle/20.500.12657/86864
Autor:
Henn, Johannes, Raman, Prashanth
We investigate positivity properties in quantum field theory (QFT). We find that planar Feynman integrals in QFT, as well as many related quantities, satisfy an infinite number of positivity conditions: the functions, as well as all their signed deri
Externí odkaz:
http://arxiv.org/abs/2407.05755
The study of collinear behavior for gauge theories in the spacelike region is of great phenomenological and theoretical importance. We analytically calculate the two-loop spacelike splitting amplitude for the full color N=4 Super-Yang-Mills theory. T
Externí odkaz:
http://arxiv.org/abs/2406.14604
Autor:
Henn, Johannes M., Matijašić, Antonela, Miczajka, Julian, Peraro, Tiziano, Xu, Yingxuan, Zhang, Yang
We compute three families of two-loop six-point massless Feynman integrals in dimensional regularization, namely the double-box, the pentagon-triangle, and the hegaxon-bubble family. This constitutes the first analytic computation of two-loop master
Externí odkaz:
http://arxiv.org/abs/2403.19742
The Amplituhedron provides, via geometric means, the all-loop integrand of scattering amplitudes in maximally supersymmetric Yang-Mills theory. Unfortunately, dimensional regularization, used conventionally for integration, breaks the beautiful geome
Externí odkaz:
http://arxiv.org/abs/2311.10814
The general structure of infrared divergences in the scattering of massive particles is captured by the soft anomalous dimension matrix. The latter can be computed from a correlation function of multiple Wilson lines. The state-of-the-art two-loop re
Externí odkaz:
http://arxiv.org/abs/2310.10145
These lecture notes bridge a gap between introductory quantum field theory (QFT) courses and state-of-the-art research in scattering amplitudes. They cover the path from basic definitions of QFT to amplitudes relevant for processes in the Standard Mo
Externí odkaz:
http://arxiv.org/abs/2306.05976
Feynman integrals are solutions to linear partial differential equations with polynomial coefficients. Using a triangle integral with general exponents as a case in point, we compare $D$-module methods to dedicated methods developed for solving diffe
Externí odkaz:
http://arxiv.org/abs/2303.11105
We study, in the context of the three-dimensional ${\cal N}=6$ Chern-Simons-matter (ABJM) theory, the infrared-finite functions that result from performing $L-1$ loop integrations over the $L$-loop integrand of the logarithm of the four-particle scat
Externí odkaz:
http://arxiv.org/abs/2303.02996