The effective Standard Model after LHC Run I
John Ellis (Theoretical Particle Physics and Cosmology Group, Physics Department, King’s College London, London, WC2R 2LS, U.K., TH Division, Physics Department, CERN, CH-1211, Geneva 23, Switzerland); Verónica Sanz (Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9QH, U.K.); Tevong You (Theoretical Particle Physics and Cosmology Group, Physics Department, King’s College London, London, WC2R 2LS, U.K.)
We treat the Standard Model as the low-energy limit of an effective field theory that incorporates higher-dimensional operators to capture the effects of decoupled new physics. We consider the constraints imposed on the coefficients of dimension-6 operators by electroweak precision tests (EWPTs), applying a framework for the effects of dimension- 6 operators on electroweak precision tests that is more general than the standard S, T formalism, and use measurements of Higgs couplings and the kinematics of associated Higgs production at the Tevatron and LHC, as well as triple-gauge couplings at the LHC. We highlight the complementarity between EWPTs, Tevatron and LHC measurements in obtaining model-independent limits on the effective Standard Model after LHC Run 1. We illustrate the combined constraints with the example of the two-Higgs doublet model.
