LoopFest XX

Session

Friday Afternoon Session 2

May 13, 2022, 4:30 PM

Benedum Hall 157 (University of Pittsburgh)

80. LoopTransport: a library to solve differential equation systems using generalized series expansions

Tobias Neumann

5/13/22, 4:30 PM

Recent developments have shown that the numerical solution of loop integrals
using generalized series expansions of associated differential equation (DE)
systems allows for the calculation of state-of-the-art multi-loop problems with
many scales. In principle the bottleneck of efficient numerical evaluations is
then reduced to the IBP reduction to master integrals. We present a library...

83. External leg corrections as an origin of large logarithms

Henning Bahl

5/13/22, 4:55 PM

The appearance of large logarithmic corrections is a well-known phenomenon in the presence of widely separated mass scales. In this talk, we point out the existence of large Sudakov-like logarithmic contributions related to external-leg corrections of heavy scalar particles which cannot be resummed straightforwardly using renormalisation group equations. Based on a toy model, we discuss in...

87. Two-loop corrections to the Classical Hamiltonian for Spinning Black Holes

Manfred Kraus (Florida State University)

5/13/22, 5:15 PM

We present our recent computation of classical gravitational potentials for spinning black holes.
The work is based on the modern scattering amplitude approach.
A wide range of techniques ranging from numerical unitarity, loop integration,Integration-by-parts,
expansion-by-regions and effective field theories are used in order to extract the classical information
from quantum scattering amplitudes.