43 citations · 45 across the 5 of their papers we have counts for
7 papers
Two-loop matter power spectrum from FFTLog and kite integrals
Paola Cappellazzi, Johannes M. Henn, Marko Simonović
We present a fast and accurate method for computing the two-loop matter power spectrum in the Effective Field Theory of Large-Scale Structure (EFTofLSS). Using FFTLog, we decompose…
The Stieltjes Bootstrap for Feynman Integrals
Hadrien Brochet, Maximilian Haensch, Johannes Henn +4
We prove that scalar Feynman integrals are Stieltjes functions in each kinematic variable , as well as in the particle masses, for arbitrary loop order, arbitrary nu…
Approximating Feynman integrals using complete monotonicity and Stieltjes properties
Sara Ditsch, Johannes M. Henn, Prashanth Raman
We present two novel approaches for the numerical evaluation of Feynman integrals based on their universal analytic properties related to positivity, namely complete monotonicity (…
Approximating Feynman Integrals Using Complete Monotonicity and Stieltjes Properties
Sara Ditsch, Johannes M. Henn, Prashanth Raman
We introduce two novel numerical approaches for computing Feynman integrals based on their complete monotonicity (CM) and Stieltjes properties. The first method uses that scalar Fe…
Analytic evaluation of the three-loop three-point form factor of in sYM
Johannes M. Henn, Jungwon Lim, William J. Torres Bobadilla
We compute analytically the three-loop correlation function of the local operator inserted into three on-shell states, in maximally supersymmetric Yang-Mills the…
Graded transcendental functions: an application to four-point amplitudes with one off-shell leg
Thomas Gehrmann, Johannes Henn, Petr Jakubčík +5
Several recent works have demonstrated the powerful algebraic simplifications that can be achieved for scattering amplitudes through a systematic grading of transcendental quantiti…
Scattering Amplitudes in Quantum Field Theory
Simon Badger, Johannes Henn, Jan Plefka +1
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 defi…