RADCOR 2019

Session

Monday Afternoon

PL

Sep 9, 2019, 2:30 PM

Chambre du Trésorier

Conveners

Monday Afternoon

• Dave Dunbar (Swansea University)

Monday Afternoon

• Dave Dunbar (Swansea University)

88. Five-Point Two-Loop Amplitudes Beyond the Planar Limit

Ben Page (IPhT, CEA-Saclay)

9/9/19, 2:30 PM

Scattering amplitudes in supersymmetric theories are known to display many remarkable structures, but most higher loop results are limited to planar theories. In this talk we discuss the structure of the recent, symbol-level, results for the N=4 SYM amplitude with full colour dependence and the N=8 SUGRA amplitude. We elaborate on the modern, ansatz-based, approach to the calculation. Leading...

89. Precision Event Shapes at the LHC: the Transverse Energy-Energy Correlator in the Back-to-Back Limit

Prof. HuaXing Zhu

9/9/19, 3:00 PM

We present an operator based factorization formula for the transverse energy-energy correlator (TEEC) hadron collider event shape in the back-to-back (dijet) limit. This factorization formula exhibits a remarkably symmetric form, being a projection onto a scattering plane of a more standard transverse momentum dependent factorization. Soft radiation is incorporated through a dijet soft...

77. NNLO local analytic subtraction for final state radiation (and beyond)

Sandro Uccirati (INFN - National Institute for Nuclear Physics)

9/9/19, 3:30 PM

I present the complete results of "Torino" local analytic subtraction of infrared divergences from final state real radiation at NNLO in QCD and report the progresses for the analogous treatment of the radiation from the initial state.

18. Non-factorizable QCD Effects in Higgs Boson Production via Vector Boson Fusion

Alexander Penin (University of Alberta)

9/9/19, 4:00 PM

We discuss nonfactorizable QCD corrections to Higgs boson production in vector boson fusion at the Large Hadron Collider. We point out that these corrections can be computed in the eikonal approximation retaining all the terms that are not suppressed by the ratio of the transverse momenta of the tagging jets to the total center-of-mass energy. Our analysis shows that in certain kinematic...

31. Simple differential equations for Feynman integrals associated to elliptic curves

Stefan Weinzierl (Universität Mainz)

9/9/19, 5:00 PM

I will discuss Feynman integrals, which are associated to elliptic curves and their differential equations. I will show for non-trivial examples how the system of differential equations can be brought into an $\varepsilon$-form. Single-scale and multi-scale cases will be discussed.

71. Analytic multi-loop results using finite fields and dataflow graphs with FiniteFlow

Tiziano Peraro

9/9/19, 5:30 PM

I will describe FiniteFlow, a framework for defining and executing numerical algorithms over finite fields and reconstructing analytically multivariate rational functions. The framework employs computational graphs, known as dataflow graphs, to combine basic building blocks into complex algorithms. This allows to easily implement a wide range of methods over finite fields in high-level...

99. The two-loop five-gluon all-plus helicity amplitude

Dr Dmitry Chicherin (Max Planck Institute for Physics)

9/9/19, 6:00 PM

As the experimental precision at the LHC keeps improving,
next-to-next-to leading order (NNLO) corrections for scattering processes have become crucial for providing theoretical predictions of comparable accuracy. At present, only observables involving up to four particles are available at this order. The main bottleneck towards higher multiplicity observables is the analytic calculation of...

72. Quark and gluon jet functions at 3-loops in QCD

Dr Prasanna K. Dhani (INFN, Florence)

9/9/19, 6:30 PM

I will talk about the recent computation of three loop jet functions (arXiv:1805.02637) in perturbative QCD. These results have been extracted from the known three loop coefficient functions for deep-inelastic scattering via the exchange of a virtual photon that couples to quarks or a scalar that couples to gluons and employing renormalization group invariance and factorization theorem. We...