Abstract
We report on a new calculation of the next-to-next-to-leading order (NNLO) 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 $\sqrt{s}=8$ TeV 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 colourful high-mass system at NNLO.
Highlights
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
Studies of top-quark production and decay are central in the LHC physics program, allowing us to precisely test the Standard Model and, at the same time, offering a window to possible physics beyond the Standard Model
We report on a new complete computation of tt production at next-tonext-to-leading order (NNLO) based on the qT subtraction formalism [34]
Summary
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. Next-to-leading order (NLO) QCD corrections to the total cross section for this production process were computed 30 years ago [1,2,3,4]. The calculation of the next-tonext-to-leading order (NNLO) QCD corrections to the tt total cross section was completed a few years ago [5,6,7,8]. Partial results for tt production were obtained by using the antenna subtraction method [26,27], by considering the qqchannel at leading color, and including the light-quark contributions [28,29,30]. The method uses IR subtraction counterterms that are constructed by considering the transverse-momentum (qT) distribution of the produced
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