Invariant-mass threshold resummation for the production of four top quarks at the LHC
Abstract
Using invariant-mass threshold resummation, we compute the invariant-mass distribution and the total cross section for tttt production at the LHC with centre-of-mass energy of 13.6 TeV at NLL' accuracy. This accuracy includes next-to-leading logarithmic contributions together with relative O(αs) non-logarithmic terms present in the threshold limit. We match the NLL' results to NLO in QCD and to complete NLO with electroweak corrections. We find that the inclusion of NLL' soft-gluon corrections significantly reduces the size of the theoretical uncertainties and greatly improves the convergence of the predictions when considering various choices of renormalisation and factorisation scales.
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