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arXiv · 1512.02535

QCD resummations for boosted top production

Andrea Ferroglia·Benjamin D. Pecjak·Darren J. Scott·Li Lin Yang
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Abstract

We present new results for QCD corrections to the top-pair invariant mass and top-quark $p_T$ distributions in boosted top-quark pair production at hadron colliders. They are derived from a formalism which allows the joint resummation of soft and small-mass logarithms at NNLL$'$ order, thus taking into account all potentially large corrections in the boosted regime, where the partonic center-of-mass energy is parameterically much larger than the mass of the top quark. We match these results with those from standard soft-gluon resummation away from the small-mass limit to NNLL order and also with NLO fixed-order calculations, so that our results are valid in the maximum possible range of phase space. The resummation effects on the $p_T$ and top-pair invariant mass distributions are significant, bringing theory predictions into better agreement with experimental data compared to pure NLO calculations.

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Andrea Ferroglia, Benjamin D. Pecjak, Darren J. Scott, Li Lin Yang. 2015-12-08. QCD resummations for boosted top production. https://arxiv.org/abs/1512.02535

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