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arXiv · 1202.2260

NLL soft and Coulomb resummation for squark and gluino production at the LHC

P. Falgari·C. Schwinn·C. Wever
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Abstract

We present predictions of the total cross sections for pair production of squarks and gluinos at the LHC, including the stop-antistop production process. Our calculation supplements full fixed-order NLO predictions with resummation of threshold logarithms and Coulomb singularities at next-to-leading logarithmic (NLL) accuracy, including bound-state effects. The numerical effect of higher-order Coulomb terms can be as big or larger than that of soft-gluon corrections. For a selection of benchmark points accessible with data from the 2010-2012 LHC runs, resummation leads to an enhancement of the total inclusive squark and gluino production cross section in the 15-30 % range. For individual production processes of gluinos, the corrections can be much larger. The theoretical uncertainty in the prediction of the hard-scattering cross sections is typically reduced to the 10 % level.

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P. Falgari, C. Schwinn, C. Wever. 2012-02-10. NLL soft and Coulomb resummation for squark and gluino production at the LHC. https://doi.org/10.1007/jhep06(2012)052

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