Virtual QCD corrections to $gg \to ZZ$: top-quark loops from a transverse-momentum expansion
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| Format: | Preprint |
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2024
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| _version_ | 1866911850582507520 |
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| author | Degrassi, Giuseppe Gröber, Ramona Vitti, Marco |
| author_facet | Degrassi, Giuseppe Gröber, Ramona Vitti, Marco |
| contents | We present the virtual corrections due to the top-quark loops for the process $gg \to ZZ$ at next-to-leading order in QCD. The associated two-loop box diagrams are computed using a small-transverse-momentum expansion. Our results are then merged with those available in the complementary energy region, obtained via a high-energy expansion, in order to provide an analytic result that is valid in the whole phase space. The results presented allow for an efficient modelling of the signal--background interference as well as the irreducible background in off-shell Higgs production. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_15113 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Virtual QCD corrections to $gg \to ZZ$: top-quark loops from a transverse-momentum expansion Degrassi, Giuseppe Gröber, Ramona Vitti, Marco High Energy Physics - Phenomenology We present the virtual corrections due to the top-quark loops for the process $gg \to ZZ$ at next-to-leading order in QCD. The associated two-loop box diagrams are computed using a small-transverse-momentum expansion. Our results are then merged with those available in the complementary energy region, obtained via a high-energy expansion, in order to provide an analytic result that is valid in the whole phase space. The results presented allow for an efficient modelling of the signal--background interference as well as the irreducible background in off-shell Higgs production. |
| title | Virtual QCD corrections to $gg \to ZZ$: top-quark loops from a transverse-momentum expansion |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2404.15113 |