Abstract
We present state-of-the art predictions for the production of supersymmetric squarks and gluinos at the Large Hadron Collider (LHC), including soft-gluon resummation up to next-to-next-to-leading logarithmic (NNLL) accuracy, the resummation of Coulomb corrections and the contribution from bound states. The NNLL corrections enhance the cross-section predictions and reduce the scale uncertainty to a level of 5-10%. The NNLL resummed cross-section predictions can be obtained from the computer code NNLL-fast, which also provides the scale uncertainty and the pdf and alpha_s error.
Highlights
We present state-of-the art predictions for the production of supersymmetric squarks and gluinos at the Large Hadron Collider (LHC), including soft-gluon resummation up to next-to-next-to-leading logarithmic (NNLL) accuracy, the resummation of Coulomb corrections and the contribution from bound states
We find that the NNLL corrections are positive and significantly enhance the next-to-leading order (NLO)+NLL cross sections
For the sake of comparison we present the cross-sections at a collider energy of S = 8 TeV and use the MSTW2008 pdf set, with NLO pdfs for results at NLO and NLO+NLL accuracy, and NNLO pdfs for results at NNLOApprox+NNLL accuracy
Summary
We begin with the general formulation of the resummed total cross section in Mellin space for hadronic processes involving the production of a heavy particle pair. We move on to discuss the resummation of Coulomb corrections and the inclusion of boundstate effects
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