Abstract
In this paper we consider the next-to-next-to-leading order total cross section of Higgs boson pair production in the large top quark mass limit and compute four expansion terms in 1/\( {m}_t^2 \). To this end, we analytically compute the real-virtual and double-real contributions to the total cross section and combine them with the existing virtual contribution. Good convergence is observed below the top quark threshold, which makes our results a valuable input for approximation methods which aim for next-to-next-to-leading order corrections over the whole kinematic range. We present details on various steps of our calculation; in particular, we provide results for three- and four-particle phase-space master integrals and describe in detail the evaluation of the collinear counterterms.
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Davies, J., Herren, F., Mishima, G. et al. Real corrections to Higgs boson pair production at NNLO in the large top quark mass limit. J. High Energ. Phys. 2022, 49 (2022). https://doi.org/10.1007/JHEP01(2022)049
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DOI: https://doi.org/10.1007/JHEP01(2022)049