N3LO approximate results for top-quark differential cross sections and forward-backward asymmetry
Abstract
I present a calculation of approximate N3LO corrections from NNLL soft-gluon resummation for differential distributions in top-antitop pair production in hadronic collisions. Soft-gluon corrections are the dominant contribution to top-quark production and closely approximate exact results through NNLO. I show aN3LO results for the total t t cross section, the top-quark pT and rapidity distributions, and the top-quark forward-backward asymmetry. The higher-order corrections are significant and they reduce theoretical uncertainties.
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