Two-loop mixed QCD-electroweak amplitudes for Z+jet production at the LHC: bosonic corrections-Reference-Cited by-同舟云学术

Two-loop mixed QCD-electroweak amplitudes for Z+jet production at the LHC: bosonic corrections

Published:2024-06-24 Issue:6 Volume:2024 Page:
ISSN:1029-8479
Container-title:Journal of High Energy Physics
language:en
Short-container-title:J. High Energ. Phys.

Author:

Bargieła Piotr^ORCID,Caola Fabrizio^ORCID,Chawdhry Herschel^ORCID,Liu Xiao^ORCID

Abstract

Abstract We present a calculation of the bosonic contribution to the two-loop mixed QCD-electroweak scattering amplitudes for Z-boson production in association with one hard jet at hadron colliders. We employ a method to calculate amplitudes in the ’t Hooft-Veltman scheme that reduces the amount of spurious non-physical information needed at intermediate stages of the computation, to keep the complexity of the calculation under control. We compute all the relevant Feynman integrals numerically using the Auxiliary Mass Flow method. We evaluate the two-loop scattering amplitudes on a two-dimensional grid in the rapidity and transverse momentum of the Z boson, which has been designed to yield a reliable numerical sampling of the boosted-Z region. This result provides an important building block for improving the theoretical modelling of a key background for monojet searches at the LHC.

Publisher

Springer Science and Business Media LLC

Link

https://link.springer.com/content/pdf/10.1007/JHEP06(2024)150.pdf

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