Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 17: Beyond the Standard Model (Theorie) II
T 17.4: Vortrag
Mittwoch, 30. März 2011, 17:30–17:45, 30.23: 6-1
Soft-gluon resummation for squark and gluino hadroproduction — Wim Beenakker1, •Silja Brensing2, Michael Krämer3, Anna Kulesza3, Eric Laenen4, 5, 6, and Irene Niessen1 — 1Theoretical High Energy Physics, IMAPP, Radboud University Nijmegen, Nijmegen, The Netherlands — 2Theory Group, DESY, Hamburg — 3Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen University, Aachen — 4IFTA, University of Amsterdam, Amsterdam, The Netherlands — 5ITF, University of Utrecht, Utrecht, The Netherlands — 6Theory Group, Nikhef, 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. The production of top and bottom squarks is treated separately. Beside analytical results we present numerical predictions for total cross sections and transverse-momentum distributions for the Tevatron and the LHC. We discuss the impact of NLL resummation and provide an estimate of the theoretical uncertainty due to scale variation and the parton distribution functions.