Abstract
I present high-order calculations, including soft-gluon corrections, for single-top and top-antitop production cross sections and differential distributions. For single-top production, results are presented for the three different channels in the Standard Model, for associated production with a charged Higgs, and for processes involving anomalous couplings. For top-antitop pair production, total cross sections and top-quark transverse-momentum and rapidity distributions are presented for various LHC energies.
Highlights
Higher-order soft-gluon corrections have been calculated through N3LO for top-quark production via various processes; see Ref. [1] for a review
We provide results with soft-gluon corrections at approximate NNLO (aNNLO) for t- and s-channel production [7], and at approximate N3LO (aN3LO) for tW production [8]; these results are obtained from next-to-next-to-leading logarithm (NNLL) resummation [7,8,9]
The aN3LO top-quark normalized rapidity distributions in ttproduction are shown in Fig. 6 at 13 TeV and 8 TeV and compared with CMS data
Summary
Higher-order soft-gluon corrections have been calculated through N3LO for top-quark production via various processes; see Ref. [1] for a review. Higher-order soft-gluon corrections have been calculated through N3LO for top-quark production via various processes; see Ref. I present the latest results for t-channel and s-channel single-top production, tW and tH− production, tZ production via anomalous couplings, and ttproduction. For all these processes QCD corrections are very significant and are dominated by soft-gluon corrections. We calculate soft-gluon corrections for partonic processes of the form f1(p1) + f2 (p2) → t(pt) + X and we define s = (p1 + p2), t = (p1 − pt), u = (p2 − pt), and s4 = s + t + u − m2.
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