Pich Zardoya, AntonioSanz Cillero, Juan JoséRosell Escribá, IgnasiProducción Científica UCH 2022UCH. Departamento de Matemáticas, Física y Ciencias Tecnológicas2022-03-012022-03-012022-01-17Rosell, I., Pich, A. & Sanz-Cillero, J.J. (2022). Heavy states and electroweak effective approaches. Proceedings of Science, vol. 398 (EPS-HEP2021), art. 425 (17 jan.). DOI: https://doi.org/10.22323/1.398.04251824-8039 (Electrónico)http://hdl.handle.net/10637/13430Esta comunicación se encuentra disponible en la página web de PoS en la siguiente URL: https://pos.sissa.it/398/425/pdfEsta comunicación forma parte de las comunicaciones leídas en la "The European Physical Society Conference on High Energy Physics (EPS-HEP2021)" dentro de la sesión "T07-T09: Combined: Top, Electroweak and Higgs Physics" celebrada online, organizada conjuntamente por la Universidad de Hamburgo y el centro de investigación DESY entre el 26 julio - 30 julio de 2021.The existence of a mass gap between the Standard Model (SM) and possible new states encourages us to use effective field theories. Here we follow the non-linear realization of the electroweak symmetry breaking: the electroweak effective theory (EWET), also known as Higgs effective field theory (HEFT) or electroweak chiral Lagrangian (EWChL). At short distances an effective resonance Lagrangian which couples the SM states to bosonic and fermionic resonances is considered. After integrating out the resonances and assuming a well-behaved high-energy behavior, we estimate or bound purely bosonic low-energy constants in terms of only resonance masses. Current experimental information on these low-energy constants allows us to constrain the high-energy resonance masses.application/pdfenopen accessParticles (Nuclear physics)Partículas (Física nuclear)Simetría (Física)Field Theory (Physics)Lagrange, Funciones de.Lagrangian functions.Campos, Teoría clásica de.Symmetry (Physics)Comunicaciónhttps://doi.org/10.22323/1.398.0425https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es