Gröber, Ramona; Maier, Andreas; Rauh, Thomas (2019). Top quark mass effects in gg → ZZ at two loops and off-shell Higgs boson interference. Physical review. D - particles, fields, gravitation, and cosmology, 100(11), p. 114013. American Physical Society 10.1103/PhysRevD.100.114013
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PhysRevD.100.114013.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (1MB) | Preview |
We consider top-quark mass effects in the Higgs-interference contribution to Z-boson pair production in gluon fusion. While this production mechanism is formally of next-to-next-to leading order, its contribution is numerically important above the top threshold M²ZZ=44m²t. This region is essential to constrain the width of the Higgs boson, and good control over the top-quark mass dependence is crucial. We determine the form factors that are relevant for the interference contribution at two-loop order using a method based on a conformal mapping and Pade ́ approximants constructed from the expansions of the amplitude for large top mass and around the top threshold.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Rauh, Thomas Johannes Georg |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1550-7998 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
17 Feb 2020 13:18 |
Last Modified: |
05 Dec 2022 15:36 |
Publisher DOI: |
10.1103/PhysRevD.100.114013 |
ArXiv ID: |
1908.04061 |
BORIS DOI: |
10.7892/boris.139889 |
URI: |
https://boris.unibe.ch/id/eprint/139889 |
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