Top-quark pair hadroproduction at next-to-next-to-leading order in QCD
Stefano CataniINFN, Sezione di Firenze and Dipartimento di Fisica e Astronomia, Università di Firenze, I-50019 Sesto Fiorentino, Florence, ItalySimone DevotoPhysik Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandMassimiliano GrazziniPhysik Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandStefan KallweitUniversità degli Studi di Milano-Bicocca, 20126 Milan, ItalyJavier MazzitelliPhysik Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandHayk SargsyanPhysik Institut, Universität Zürich, CH-8057 Zürich, Switzerland
2019en
ABI
Annotatsiya
We report on a new calculation of the next-to-next-to-leading order QCD radiative corrections to the inclusive production of top-quark pairs at hadron colliders. The calculation is performed by using the ${q}_{T}$ subtraction formalism to handle and cancel infrared singular contributions at intermediate stages of the computation. We present numerical results for the total cross section in $pp$ collisions at $\sqrt{s}=8$ and 13 TeV, and we compare them with those obtained by using the publicly available numerical program Top++. Our computation represents the first complete application of the ${q}_{T}$ subtraction formalism to the hadroproduction of a colorful high-mass system at next-to-next-to-leading order.
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