Wuppertal 2015 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 32: Jenseits des Standardmodells 1 (Theorie)

T 32.2: Vortrag

Montag, 9. März 2015, 17:00–17:15, K.12.23 (K1)

Threshold Resummation for Squark and Gluino Production at the LHC — Wim Beenakker¹, •Christoph Borschensky², Michael Krämer³, Anna Kulesza², Eric Laenen⁴, Vincent Theeuwes², and Silja Thewes⁵ — ¹Theoretical High Energy Physics, IMAPP, Radboud University Nijmegen, The Netherlands — ²Institute for Theoretical Physics, WWU Münster — ³Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen — ⁴Nikhef Theory Group, Amsterdam, The Netherlands — ⁵DESY Theory Group, Hamburg

The search for supersymmetry is one of the main tasks of the Large Hadron Collider (LHC). Precise theoretical calculations of production cross sections are very important for the analysis of experimental data. Beyond leading order in the computation of cross sections, large logarithmic terms arise in certain kinematical regions, endangering the perturbative expansion. Threshold resummation is a method to treat these terms in a systematic manner. It is known to have a significant impact on production cross sections and their theoretical uncertainties.

After a short introduction on threshold resummation, I will present the latest results for squark and gluino production cross sections including soft-gluon corrections up to next-to-next-to-leading logarithmic accuracy, with a particular focus on the production of stops. Additionally, so-called hard-matching coefficients and Coulomb contributions are included. In light of the next LHC run, results for 13 and 14 TeV and higher energies will be shown.