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Invariant-mass threshold resummation reduces theoretical uncertainties in four top quarks production, suggesting improved predictions.
Using invariant-mass threshold resummation, we compute the invariant-mass distribution and the total cross section for tt̄tt̄ 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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Beekveld et al. (2025) studied this question.
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