Speaker
Description
In this talk we present results for soft gluon resummation applied to the production of four top quarks in the absolute mass threshold limit. The theoretical predictions at NLO, including a full set of strong and electroweak NLO corrections, yield a relatively large error due to scale variation. We compute the resummed cross section at next-to-leading logarithmic (NLL$^\prime$) accuracy, taking into account non-logarithmic $\mathcal{O}(\alpha_s)$ contributions that do not vanish at threshold. By considering the matching of the NLL$^\prime$ result to the available NLO result, we achieve NLO+NLL$^\prime$ precision for the total cross section. The threshold-resummed result shows an improved scale dependence when compared to the fixed-order calculation.
