Loops and Legs in Quantum Field Theory

Session

Parallel 9

29 Apr 2022, 14:30

Raum Ettal

Conveners

Parallel 9

• Thomas Gehrmann (University of Zurich)

Parallel 9

• Thomas Gehrmann (University of Zurich)

92. Endpoint factorization and next-to-leading power resummation of gluon thrust

M Beneke (TUM)

29/04/2022, 14:30

73. Mixed QCD-Electroweak corrections to the Drell-Yan process in the high invariant mass region

Chiara Signorile-Signorile (KIT (Karlsruhe))

29/04/2022, 15:00

The Drell-Yan process continues to play an import role in putting to test the Standard Model (SM) and possibly revealing physics beyond it. In particular, investigating the high invariant mass region can be used to constrain heavy New Physics. To achieve this goal, high-precision theoretical predictions within the SM are needed. In this talk, we will focus on mixed QCD-electroweak corrections,...

54. Two-loop mixed QCD-EW corrections to neutral current Drell-Yan

Simone Devoto (UNIMI)

29/04/2022, 15:30

We present the mixed QCD-EW two-loop virtual amplitudes for the neutral current Drell-Yan production, one of the bottlenecks for the complete calculation of the NNLO mixed QCD-EW corrections. We present the computational details and the first steps towards their automation.

We describe the evaluation of all the relevant two-loop Feynman integrals using analytical and semi-analytical...

37. Kira, Feynman integral reduction program -- new developments

Johann Usovitsch (CERN)

29/04/2022, 16:30

In this talk we discuss new developments in the open-source Feynman
integral reduction tool Kira.

We explore algorithmic improvements like the construction of
block-triangular systems for more efficient reductions and new features
to help in the calculation of master integrals through differential
equations.
Kira's ability to solve homogeneous linear systems of equations can also
be...

75. UV and IR rational terms in two-loop amplitudes

Hantian Zhang (Karlsruhe Institute of Technology)

29/04/2022, 17:00

Rational terms are a key ingredient for the automation of loop calculations through numerical methods. Nowadays widely-used automated NLO tools on the market usually construct their numerators of loop integrands in 4 dimensions, while the missing (D-4) part is reconstructed through the rational terms separately. Recently, several progresses [1-3] have been made to formulate and compute the...

15. Towards two-loop automation in OpenLoops

Max Zoller (PSI, Villigen)

29/04/2022, 17:30

Towards two-loop automation in OpenLoops

Numerical tools, such as OpenLoops, provide NLO scattering amplitudes for a very wide range of hard scattering amplitudes in a fully automated way. In order to match the numerical precision of current and future experiments, however, the higher precision of NNLO calculations is essential, and their automation in a similar tool highly desirable....