Coupling of tt̄ and γγ with a strongly interacting Electroweak Symmetry Breaking Sector

Departamento de Física Teórica I, Universidad Complutense de Madrid, E-28040 Madrid, Spain. On leave at the Stanford Linear Accelerator Center (SLAC), 2575 Sand Hill Road, Menlo Park, CA 94025, USA

^a e-mail: rdelgadol@ucm.es

Published online: 22 March 2017

Abstract

We report the coupling of an external γγ or tt̄ state to a strongly interacting EWSBS satisfying unitarity. We exploit perturbation theory for those coupling of the external state, whereas the EWSBS is taken as strongly interacting. We use a modified version of the IAM unitarization procedure to model such a strongly interacting regime. The matrix elements V_LV_L → V_LV_L, V_LV_L ↔ hh, hh → hh, V_LV_L ↔ {γγ, tt̄}, hh ↔ {γγ, tt̄} are all computed to NLO in perturbation theory with the Nonlinear Effective Field Theory of the EWSBS, within the Equivalence Theorem. This allows us to describe resonances of the electroweak sector that may be found at the LHC and their effect on other channels such as γγ or tt̄ where they may be discovered.