Loops and Legs in Quantum Field Theory

Session

Plenary 1

26 Apr 2022, 09:00

Rosner Aula

Conveners

Plenary 1

• Peter Marquard (DESY)

Plenary 1

• Peter Marquard (DESY)

Presentation materials

welcome.pdf

34. Production and decay of a heavy boson in association with top quarks

Malgorzata WOREK (RWTH Aachen University)

26/04/2022, 09:00

I will report on the calculation of the NLO QCD corrections to heavy boson production and decay in association with top quark. In the calculation all resonant as well as non-resonant Feynman diagrams, interferences and off-shell effects are included both for the top quark and W gauge boson. Numerical results will be given at the integrated and differential fiducial level for various...

72. Status of double virtual NNLO QCD corrections for high multiplicity processes

Vasily Sotnikov (University of Zurich)

26/04/2022, 09:30

Pushing the reach of NNLO QCD predictions to 2→3 production processes is one of the pillars of precision phenomenology program at the LHC. In this talk we will overview recent results and developments in calculation of two-loop five-point amplitudes contributing towards achieving this goal. We will discuss challenges encountered in advancing the state-of-the-art beyond the class of massless...

79. Recent developments within the MATRIX framework

Stefan Kallweit (Università degli Studi di Milano-Bicocca)

26/04/2022, 10:00

The MATRIX framework was originally developed to compute diboson production
at next-to-next-to-leading order (NNLO) accuracy in QCD perturbation theory
by means of the qT-subtraction method, building upon the MUNICH integrator and
the external scattering amplitudes.
In its second official release of last summer, this framework was extended in
several directions, in particular by including...

6. Differential N3LO QCD corrections to neutral and charged current at the LHC

Xuan Chen (University of Zurich)

26/04/2022, 11:00

Recent development of fixed order QCD calculations enables us to achieve next-to-next-to-next-to leading order QCD accuracy for differential observables at the LHC. We present the latest results of neutral and charged current production at the LHC using NNLOJET package plus factorised contributions calculated in SCET.

55. Three-loop planar integrals for four-point one-mass processes

Nikolaos Syrrakos (TUM)

26/04/2022, 11:30

I will present analytic expressions for the two tennis-court integral families relevant to three-loop $2\to2$ scattering processes involving one massive external particle and massless propagators in terms of Goncharov polylogarithms of up to transcendental weight six. Additionally, I will also present analytic expressions for physical kinematics for the ladder-box family and the two...

28. Three loop massive form factors

Kay Schoenwald (KIT)

26/04/2022, 12:00

We present a powerful method to compute one-scale master integrals
using differential equations combined with numerical matching.
The latter is achieved with the help of deep expansions around
regular and singular kinematic points.
As an applications we consider massive three loop form factors.
We show that the method can be applied to systems of
differential equations involving several...

65. Two-loop QCD corrections to five-particle amplitudes with one massive leg

Simone Zoia (University of Turin)

I discuss the recent advances in the computation of two-loop scattering amplitudes for five-particle processes with one external massive leg. The latter are crucial ingredients to obtain NNLO QCD predictions for many interesting LHC processes. I present a basis of transcendental functions which enables a fast and stable evaluation of all the planar Feynman integrals, and a workflow based on...