Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Johannes M. Henn"'
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 8, Pp 1-25 (2023)
Abstract In recent years, differential equations have become the method of choice to compute multi-loop Feynman integrals. Whenever they can be cast into canonical form, their solution in terms of special functions is straightforward. Recently, progr
Externí odkaz:
https://doaj.org/article/b6fadf30a42d40679933dc746543ddd5
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 5, Pp 1-34 (2023)
Abstract We study, in the context of the three-dimensional N $$ \mathcal{N} $$ = 6 Chern-Simons-matter (ABJM) theory, the infrared-finite functions that result from performing L − 1 loop integrations over the L-loop integrand of the logarithm of th
Externí odkaz:
https://doaj.org/article/47fc4b2393294e1a8af402dbf64c2eba
First look at the evaluation of three-loop non-planar Feynman diagrams for Higgs plus jet production
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 5, Pp 1-17 (2023)
Abstract We present new computations for Feynman integrals relevant to Higgs plus jet production at three loops, including first results for a non-planar class of integrals. The results are expressed in terms of generalised polylogarithms up to trans
Externí odkaz:
https://doaj.org/article/e6c2047b7bc941b6bfc687f0960ca02d
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 1, Pp 1-34 (2023)
Abstract The state-of-the-art in current two-loop QCD amplitude calculations is at five-particle scattering. Computing two-loop six-particle processes requires knowledge of the corresponding one-loop amplitudes to higher orders in the dimensional reg
Externí odkaz:
https://doaj.org/article/b4623128920d4b1a9028c892ae016ec5
Autor:
Dmitry Chicherin, Johannes M. Henn
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 7, Pp 1-53 (2022)
Abstract Null Wilson loops in N $$ \mathcal{N} $$ = 4 super Yang-Mills are dual to planar scattering amplitudes. This duality implies hidden symmetries for both objects. We consider closely related infrared finite observables, defined as the Wilson l
Externí odkaz:
https://doaj.org/article/9723afdbe72f413092d1a0e694f4575e
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 3, Pp 1-34 (2022)
Abstract Feynman integrals in quantum field theory evaluate to special functions and numbers that are usefully described by the notion of transcendental weight. In this paper, we propose a way of projecting a given dimensionally-regularised Feynman i
Externí odkaz:
https://doaj.org/article/0679fa56a66e4986addfa330f638121c
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 4, Pp 1-27 (2020)
Abstract We present the complete formula for the cusp anomalous dimension at four loops in QCD and in maximally supersymmetric Yang-Mills. In the latter theory it is given by Γ cusp , A α s 4 = − α s N π 4 73 π 6 20160 + ζ 3 2 8 + 1 N 2 31 π
Externí odkaz:
https://doaj.org/article/707847120bf54b8c8109379a4e20eae8
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 5, Pp 1-29 (2019)
Abstract We compute the fermionic contributions to the cusp anomalous dimension in QCD at four loops as an expansion for small cusp angle. As a byproduct we also obtain the respective terms of the four-loop HQET wave function anomalous dimension. Our
Externí odkaz:
https://doaj.org/article/5305d96f001743be819062b4ba5f1680
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 3, Pp 1-23 (2019)
Abstract We compute for the first time the two-loop five-particle amplitude in N $$ \mathcal{N} $$ = 8 supergravity. Starting from the known integrand, we perform an integration-by-parts reduction and express the answer in terms of uniform weight mas
Externí odkaz:
https://doaj.org/article/f87f70b486fd4f1db40979bd1981aa05
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 4, Pp 1-40 (2018)
Abstract Wilson lines capture important features of scattering amplitudes, for example soft effects relevant for infrared divergences, and the Regge limit. Beyond the leading power approximation, corrections to the eikonal picture have to be taken in
Externí odkaz:
https://doaj.org/article/dfbac92e57a440b1a2541192928d0a67