RADCOR 2019

Session

Wednesday Morning A

Sep 11, 2019, 9:00 AM

Chambre du Trésorier

Conveners

Wednesday Morning A

• Alexander Penin (University of Alberta)

Wednesday Morning A

• Alexander Penin (University of Alberta)

76. Decomposition of Feynman Integrals on the Maximal Cut by Intersection Numbers

Manoj Kumar Mandal

9/11/19, 9:00 AM

The reduction of a large number of scalar multi-loop integrals to the smaller set of Master Integrals is an integral part of the computation of any multi-loop amplitudes. The reduction is usually achieved by employing the traditional Integral-By-Parts (IBP) relations. However, in case of integrals with large number of scales, this quickly becomes a bottleneck. In this talk, I will show the...

54. Diagrammatic Coaction of Two-Loop Feynman Integrals

James Matthew (University of Edinburgh)

9/11/19, 9:30 AM

It is known that one-loop Feynman integrals possess an algebraic structure encoding their analytic properties called the coaction, which can be written in terms of Feynman integrals and their cuts. This diagrammatic coaction, and the coaction on other classes of integrals such as hypergeometric functions, may be expressed using suitable bases of differential forms and integration contours....

58. Intersection Theory and Higgs Physics

Dr Hjalte Axel Frellesvig (University of Padova)

9/11/19, 10:00 AM

When finding linear relations between Feynman integrals using integration-by-parts identities, a very large linear system has to be solved as an intermediate step.
This makes other approaches to the derivation of these identities a worthwhile pursuit. In this context, the concept of the intersection number is of interest, as it allows for the definition of (what amounts to) a scalar product...

68. Calculating the static gravitational two-body potential to fifth post-Newtonian order with Feynman diagrams

Christian Sturm

9/11/19, 11:00 AM

The effective field theory approach to general relativity allows to
apply techniques for computing Feynman diagrams used in high energy
physics in order to calculate the gravitational two-body potential. In the
talk I will discuss the first-time calculation of the static two-body
potential to fifth post-Newtonian order. These results were achieved
thanks to a manifest factorization...

45. Orbital dynamics from the double copy and effective field theory

Mao Zeng (UC Los Angeles)

9/11/19, 11:30 AM

We compute the third-post-Minkowskian conservative Hamiltonian of binary black holes using modern tools from scattering amplitudes and effective field theory. In the limit of large separation, non-spinning black holes have an effective description in terms scalar field particles coupled to gravity. The two-loop integrand is constructed using generalized unitarity and the double copy...

43. The Gravitational Potential of Two Point Masses at Five Loops

Dr Andreas Maier (DESY)

9/11/19, 12:00 PM

Higher-order corrections to the interaction potential between non-relativistic massive objects can be obtained systematically in a Post-Newtonian expansion in the small velocity and weak coupling. We present the calculation of these corrections up to five loops using techniques from multi-loop computations in high-energy physics.

41. Elastic neutrino-electron scattering within the effective field theory approach

Dr Oleksandr Tomalak (University of Kentucky)

9/11/19, 12:30 PM

Elastic neutrino-electron scattering provides an important tool for normalizing neutrino flux in modern experiments. This process is subject to large radiative corrections. We determine the Fermi effective theory performing the one-loop matching to the Standard model at the electroweak scale with subsequent running down to GeV scale. Based on this theory, we analytically evaluate virtual...