RADCOR 2019

Session

Wednesday Morning B

Sep 11, 2019, 9:00 AM

Cubiculaire

Conveners

Wednesday Morning B

• Aude Gehrmann-De Ridder (ETH, Zurich)

Wednesday Morning B

• Jozef Anton Vermaseren

8. Master integrals for all unitarity cuts of massless 4-loop propagators

Vitalii Maheria

9/11/19, 9:00 AM

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Among the unitarity cuts of massless 4-loop propagators two classes remain unknown: 2-loop 3-particle, and 1-loop 4-particle cuts. I'd like to fill this gap and present the calculation of master integrals for both of these cuts. I would also like to discuss the ongoing work of using those to compute semi-inclusive phase-space integrals relevant to the calculation of NNLO time-like splitting functions.

63. Violation of the Kluberg-Stern-Zuber theorem and operator mixing in SCET

Martin Beneke (Technische Universitaet Muenchen (DE))

9/11/19, 9:30 AM

A well-known result states that operators that vanish by the classical equation of motion do not mix into physical operators. The result guarantees that the S-matrix is invariant under large classes of field redefinitions. It is shown that (and why) the theorem is violated in soft-collinear effective theory beyond the leading power in the soft-collinear expansion. The mixing of eom operators...

48. Threshold resummation at next-to-leading power

Robert Szafron (TU München)

9/11/19, 10:00 AM

In this talk, I am going to report on the resummation of the leading logarithmic corrections for the Drell-Yan production and Higgs production in gluon fusion at the next-to-leading power in threshold expansion. I will describe how the kinematic power-corrections are accounted for and the structure of renormalisation group equations for the generalised soft function which appears after...

20. Four-Loop Higgs- and Z-Decay and the Five-Loop Beta-Function

Johann Kuehn

9/11/19, 11:00 AM

Recent results concerning Higgs- and Z-boson decay rate
in order alpha**4 and the five-loop beta-function are presented.

23. Heavy quark form factors at three loops

Peter Marquard (DESY)

9/11/19, 11:30 AM

We present new results for heavy quark form factors at three loop order.

17. On the four-loop form factors of massless QCD

Robert Schabinger

9/11/19, 12:00 PM

In this talk, we discuss our ongoing calculation of the four-loop form factors of massless QCD. In particular, we present results for the quark and gluon form factors which we have calculated for the first time using novel computational techniques.

83. Top mass effects in HJ and HH production

Matthias Kerner (University of Zürich)

9/11/19, 12:30 PM

I will present NLO corrections to Higgs boson production in association with a jet, retaining the full dependence on the top quark mass. Details of the calculation will be presented, focusing on the evaluation of the two-loop integrals, which is done numerically with the program SedDec. In particular I will present various improvements to the code, which have been achieved since the first...