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,...
We study associated production of heavy quarkonia and D mesons in the improved color evaporation model using the high-energy factorization as it is formulated in the parton Reggeization approach. The last one is based on the modified Kimber-Martin-Ryskin-Watt model for unintegrated parton distribution functions and the effective field theory of Reggezied gluons and quarks, suggested by L.N....
I will present the Next-to-next-to-leading order QCD massive corrections,
induced by a loop of top quarks, to di-photon production in proton-proton
collisions. This process is very important as a test of perturbative QCD
and as a background process for the decay of a Higgs into two photons.
All the involved partonic subprocesses are taken into account; in
particular the quark-antiquark...
The measurement of the top-quark mass in top-quark pair production using the full Run 2 dataset collected with the ATLAS experiment at √s = 13 TeV will be presented. This measurement is carried out in the dilepton channel using a template method. The talk will have a special emphasis on the theoretical uncertainties affecting experimental measurements of the top-quark mass, as more and more...
In this work we present the tools developed for the automatization of the calculation of the soft anomalous dimension matrices for the heavy-quark hadroproduction processes at one- and two-loop accuracy in QCD. The foundation of this procedure is the construction of orthogonal color basis for $2 \rightarrow n$ processes which will also be discussed. The application of these tools is...
