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arXiv · 1601.02954

NNLL resummation for stop pair-production at the LHC

Wim Beenakker·Christoph Borschensky·Raphael Heger·Michael Krämer·Anna Kulesza·Eric Laenen
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Abstract

The production of supersymmetric stop-antistop pairs at the Large Hadron Collider (LHC) is studied including corrections from soft-gluon resummation up to next-to-next-to-leading logarithmic (NNLL) accuracy in the Mellin-space approach. Additionally, corrections to the hard-matching coefficient at one-loop and Coulomb contributions at two-loop order are considered. The NNLL corrections enhance the cross section for all stop masses at centre-of-mass energies of 8 and 13 TeV compared to the previously calculated predictions at next-to-leading logarithmic (NLL) accuracy. Furthermore, a slight increase in the dependence on the additional stop-mixing parameters is observed.

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Wim Beenakker, Christoph Borschensky, Raphael Heger, Michael Krämer, Anna Kulesza, Eric Laenen. 2016-05-30. NNLL resummation for stop pair-production at the LHC. https://doi.org/10.1007/jhep05(2016)153

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