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- Title
Gluon fusion production at NLO: merging the transverse momentum and the high-energy expansions.
- Authors
Bellafronte, Luigi; Degrassi, Giuseppe; Giardino, Pier Paolo; Gröber, Ramona; Vitti, Marco
- Abstract
The virtual corrections to gg → HH and gg → ZH are analytically evaluated combining an expansion in the small transverse momentum of the final particles with an expansion valid at high energies. The two expansion methods describe complementary regions of the phase space and we merge their results, extending the range of validity of both expansions using Padé approximants. We show that this approach can reproduce the available numerical results retaining the exact top quark mass dependence with an accuracy below the 1% level. Our results allow a fast and flexible evaluation of the virtual corrections of the considered processes. Furthermore, they are available in different renormalisation schemes of the top quark mass.
- Subjects
TOP quarks; PHASE space; HIGGS bosons; GLUONS
- Publication
Journal of High Energy Physics, 2022, Vol 2022, Issue 7, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP07(2022)069