Pich, AntonioRosell, IgnasiSantos, JoaquínSanz Cillero, Juan José2023-06-182023-06-182017-04-041029-847910.1007/JHEP04(2017)012https://hdl.handle.net/20.500.14352/19388The couplings of the electroweak effective theory contain information on the heavy-mass scales which are no-longer present in the low-energy Lagrangian. We build a general effective Lagrangian, implementing the electroweak chiral symmetry breaking SU(2) L ⊗ SU(2) R → SU(2) L+R , which couples the known particle fields to heavier states with bosonic quantum numbers J P = 0± and 1±. We consider colour-singlet heavy fields that are in singlet or triplet representations of the electroweak group. Integrating out these heavy scales, we analyze the pattern of low-energy couplings among the light fields which are generated by the massive states. We adopt a generic non-linear realization of the electroweak symmetry breaking with a singlet Higgs, without making any assumption about its possible doublet structure. Special attention is given to the different possible descriptions of massive spin-1 fields and the differences arising from naive implementations of these formalisms, showing their full equivalence once a proper short-distance behaviour is required.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttps://doi.org/10.1007/JHEP04%282017%29012open accessBeyond Standard ModelChiral LagrangiansHiggs PhysicsTechnicolor and Composite ModelsElectromagnetismoFísica-Modelos matemáticosFísica matemática2202 Electromagnetismo