Speaker
Dr
Ignasi Rosell
(Universidad CEU Cardenal Herrera & IFIC, Valencia)
Description
We present a one-loop calculation of the oblique S and T parameters within strongly-coupled models of electroweak symmetry breaking with a light Higgs-like boson. We use a general effective Lagrangian, implementing the chiral symmetry breaking SU(2)_L⊗SU(2)_R → SU(2)L+R with Goldstones, gauge bosons, the Higgs-like scalar and one multiplet of vector and axial-vector massive resonance states. The estimation is based on the short-distance constraints and a dispersive approach. The experimentally allowed range forces the vector and axial-vector states to be heavy, with masses above the TeV scale, and suggests that the Higgs-like scalar should have a WW coupling close to the Standard Model one.
Author
Dr
Ignasi Rosell
(Universidad CEU Cardenal Herrera & IFIC, Valencia)
