NNLL resummation for squark-antisquark pair production at the LHC

By W. Beenakker, Silja Brensing, Michael Krämer, A. Kulesza, E. Laenen, I. Niessen. Journal of High Energy Physics, 2011

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We consider the resummation of soft gluon emission for squark-antisquark pair-production at the LHC at next-to-next-to-leading-logarithmic (NNLL) accuracy in the framework of the minimal supersymmetric standard model. We present the analytical ingredients needed for the calculation and provide numerical predictions for the LHC at centre-of-mass energies of 7 and 14 TeV. We find a significant reduction in the scale uncertainty and a considerable increase in the prediction of the total cross section. Compared to the next-to-leading order prediction, the corrections increase the cross section by up to 30% for 1.5 TeV squarks at a centre-of-mass energy of 7 TeV.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/51f1b284f9ee2a2080052767ce5cfc272405cab2

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Citations in the corpus

Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum (2019, methodology): “The production cross sections are determined with approximate NNLO plus next-to-next-to-leading logarithmic (NNLL) accuracy [73–84].”
NNLL-fast: predictions for coloured supersymmetric particle production at the LHC with threshold and Coulomb resummation (2016, methodology): “The present state-of-the-art is that threshold resummation corrections up to next-to-next-to-leading logarithmic (NNLL) accuracy have been implemented for gluinos and first- and second-generation squarks in [47–53], and recently also for stops in [54, 55].”