We present the virtual corrections due to the top-quark loops for the process gg → 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.

Degrassi, G., Grober, R., Vitti, M. (2024). Virtual QCD corrections to gg → ZZ: top-quark loops from a transverse-momentum expansion. JOURNAL OF HIGH ENERGY PHYSICS, 2024(7) [10.1007/JHEP07(2024)244].

Virtual QCD corrections to gg → ZZ: top-quark loops from a transverse-momentum expansion

Degrassi G.;
2024-01-01

Abstract

We present the virtual corrections due to the top-quark loops for the process gg → 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.
2024
Degrassi, G., Grober, R., Vitti, M. (2024). Virtual QCD corrections to gg → ZZ: top-quark loops from a transverse-momentum expansion. JOURNAL OF HIGH ENERGY PHYSICS, 2024(7) [10.1007/JHEP07(2024)244].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/486887
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