Electroweak effective theory and beyond Standard Model resonances
Abstract
We consider a non-linear realization of the electroweak symmetry-breaking pattern SU(2)L× SU(2)R/SU(2)L+R to construct a low-energy effective theory, later extended by the inclusion of heavy new-physics resonances. After assuming appropriate high-energy constraints given by Weinberg sum-rules and the asymptotic behaviour of form-factors, we obtain relations between resonance masses and some low-energy effective couplings. These predictions are compared with current experimental data and some resonance mass bounds are inferred.
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