Two-loop QCD corrections to $ZH$ and off-shell $Z$ boson pair production in gluon fusion
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arXiv
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| Hauptverfasser: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909776804315136 |
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| author | Davies, Joshua Grau, Dominik Schönwald, Kay Steinhauser, Matthias Stremmer, Daniel Vitti, Marco |
| author_facet | Davies, Joshua Grau, Dominik Schönwald, Kay Steinhauser, Matthias Stremmer, Daniel Vitti, Marco |
| contents | We compute two-loop corrections to the associated production of a Higgs boson with a $Z$ boson and to off-shell $Z$ boson pair production in the gluon fusion channel, mediated by a heavy quark. We perform deep expansions in the high-energy region and around the forward limit and show that their combination covers the whole phase space. Our results constitute the next-to-leading order virtual corrections to these processes. Their numerical evaluation is fast and the dependence on all parameters is maintained, thus a change of parameter values or renormalization scheme is straightforward. As a by-product of our calculation, we also obtain the two-loop heavy quark mediated virtual corrections to the processes of off-shell di-photon and photon-$Z$ production. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_07072 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Two-loop QCD corrections to $ZH$ and off-shell $Z$ boson pair production in gluon fusion Davies, Joshua Grau, Dominik Schönwald, Kay Steinhauser, Matthias Stremmer, Daniel Vitti, Marco High Energy Physics - Phenomenology We compute two-loop corrections to the associated production of a Higgs boson with a $Z$ boson and to off-shell $Z$ boson pair production in the gluon fusion channel, mediated by a heavy quark. We perform deep expansions in the high-energy region and around the forward limit and show that their combination covers the whole phase space. Our results constitute the next-to-leading order virtual corrections to these processes. Their numerical evaluation is fast and the dependence on all parameters is maintained, thus a change of parameter values or renormalization scheme is straightforward. As a by-product of our calculation, we also obtain the two-loop heavy quark mediated virtual corrections to the processes of off-shell di-photon and photon-$Z$ production. |
| title | Two-loop QCD corrections to $ZH$ and off-shell $Z$ boson pair production in gluon fusion |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2509.07072 |