Mainz 2014 – scientific programme
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T: Fachverband Teilchenphysik
T 104: Jenseits des Standardmodells (Theorie) 3
T 104.7: Talk
Thursday, March 27, 2014, 18:15–18:30, P6
Effective field theory analysis of new physics in e+ e− → W+ W− — Gerhard Buchalla1, Oscar Catà1,2,3, •Rudi Rahn1,4, and Matthias Schlaffer1,5 — 1Ludwig-Maximilians-Universität München — 2Technische Universität München, Garching — 3TUM-IAS, Garching — 4University of Oxford, Oxford, UK — 5DESY, Hamburg
We use a model-independent electroweak chiral Lagrangian to describe electroweak symmetry breaking, and include the next-to-leading order (NLO) effective operators arising as counterterms to describe new physics at the TeV scale. This Lagrangian is used to compute the NLO corrections to polarised e+ e− → W+ W− scattering. We find that only a subset of the available operators contributes corrections to the cross sections at all, and only a smaller subset contributes to leading order in a large-s expansion. An explanation by the Goldstone equivalence theorem is provided. Finally we discuss the absence of effects due to the physical Higgs scalar and present one possible UV theory as an example.