Top quark mass effects in gg → ZZ at two loops and off-shell Higgs boson interference

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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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:

17 Feb 2020 13:18

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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