Abstract
We compute the next-to-leading virtual QCD corrections to the partonic cross section of the production of a Higgs boson in association with a Z boson in gluon fusion. The calculation is based on the recently introduced method of evaluating the amplitude via an expansion in terms of a small transverse momentum. We generalize the method to the case of different masses in the final state and of a process not symmetric in the forward-backward direction exchange. Our analytic approach gives a very good approximation (better than percent) of the partonic cross section in the center of mass energy region up to ∼ 750 GeV, where at the LHC ∼ 98% of the total hadronic cross section is concentrated.
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Alasfar, L., Degrassi, G., Giardino, P.P. et al. Virtual corrections to gg → ZH via a transverse momentum expansion. J. High Energ. Phys. 2021, 168 (2021). https://doi.org/10.1007/JHEP05(2021)168
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DOI: https://doi.org/10.1007/JHEP05(2021)168