2025/12/10 by Davies, Joshua, Schönwald, Kay, Steinhauser, Matthias
#530 Physics
paper · doi:10.5167/uzh-281050
We compute the three-loop form factors for gg → HH in the limit of vanishing transverse momentum of the Higgs boson which provides a reasonable approximation of the cross section. In our calculations we adopt the large-N c limit and restrict ourselves to the contributions with one closed top quark loop, which already includes non-trivial non-planar Feynman diagrams. We discuss the results for top quark masses in the pole and \textrmMS MS ¯ schemes and show that the scheme dependence is significantly reduced at next-to-next-to-leading order.