Bonn 2010 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 17: Beyond the Standard Model (Theorie) I
T 17.6: Vortrag
Montag, 15. März 2010, 18:00–18:15, HG XIV
Soft-gluon resummation for squark and gluino hadroproduction — Wim Beenakker1, •Silja Brensing2, Michael Krämer2, Anna Kulesza2, Eric Laenen3,4,5, and Irene Niessen1 — 1Theoretical High Energy Physics, Radboud University Nijmegen, Nijmegen, The Netherlands — 2Institut für Theoretische Physik, RWTH Aachen University, Aachen, Germany — 3IFTA, University of Amsterdam, Amsterdam, The Netherlands — 4ITF, Utrecht University, Utrecht, The Netherlands — 5Nikhef Theory Group, Amsterdam, The Netherlands
We consider the resummation of soft gluon emission for squark and gluino hadroproduction at next-to-leading-logarithmic (NLL) accuracy in the framework of the minimal supersymmetric standard model. We present analytical results for squark-squark and squark-gluino production and provide numerical predictions for all squark and gluino pair-production processes at the Tevatron and at the LHC. Moreover we present analytical and numerical results for top-squark pair-production. The size of the soft-gluon corrections and the reduction in the scale uncertainty are most significant for processes involving gluino production. At the LHC, where the sensitivity to squark and gluino masses ranges up to 3 TeV, the corrections due to NLL resummation over and above the NLO predictions can be as high as 35% in the case of gluino-pair production, whereas at the Tevatron, the NLL corrections are close to 40% for squark-gluino final states with sparticle masses around 500 GeV.