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arXiv · 1204.5201

Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X

Peter Baernreuther·Michal Czakon·Alexander Mitov
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Abstract

We compute the Next-to-Next-to-Leading Order (NNLO) QCD corrections to the partonic reaction that dominates top-pair production at the Tevatron. This is the first ever NNLO calculation of an observable with more than two colored partons, and/or massive fermions, at hadron colliders. Augmenting our fixed order calculation with soft-gluon resummation through Next-to-Next-to-Leading Logarithmic (NNLL) accuracy, we observe that the predicted total inclusive cross-section exhibits a very small perturbative uncertainty, estimated at +-2.7%. We expect that once all sub-dominant partonic reactions are accounted for, and work in this direction is ongoing, the perturbative theoretical uncertainty for this observable could drop below +-2%. Our calculation demonstrates the power of our computational approach and proves it can be successfully applied to all processes at hadron colliders for which high-precision analyses are needed.

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Peter Baernreuther, Michal Czakon, Alexander Mitov. 2012-04-23. Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X. https://doi.org/10.1103/physrevlett.109.132001

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