Rosell Escribá, IgnasiProducción Científica UCH 2009UCH. Departamento de Matemáticas, Física y Ciencias Tecnológicas2020-12-172020-12-172009-10-05Rosell, I. (2009). Resonance saturations of the chiral couplings at NLO. Proceedings of Science, vol. 069 (EFT09), art. 023 (5 oct.). DOI: https://doi.org/10.22323/1.069.00231824-8039 (Electrónico)http://hdl.handle.net/10637/11772Esta comunicación se encuentra disponible en la página web de PoS en la siguiente URL: https://pos.sissa.it/069/023/pdfEsta comunicación forma parte de las comunicaciones leídas en la "International Workshop on Effective Field Theories: from the pion to the upsilon" dentro de la sesión "Tuesday Afternoon" celebrada en Valencia (España) entre el 2-6 de febrero de 2009.A proper estimation of the chiral low-energy constants of Chiral Perturbation Theory is a very important task. To this end resonance chiral Lagrangians have been used fruitfully. We have studied the determination of chiral couplings at next-to-leading (NLO) order in the 1=NC expansion, keeping full control of the renormalization scale dependence. We find that, by imposing shortdistance constraints coming from QCD, resonance saturation at NLO in 1=NC is satisfied. In other words, the chiral couplings can be written in terms of the resonance masses and couplings and do not depend explicitly on the coefficients of the chiral operators in the Goldstone boson sector of Resonance Chiral Theory.application/pdfesopen accessCromodinámica cuántica.Lagrange, Funciones de.Lagrangian functions.Campos, Teoría cuántica de.Partículas (Física nuclear)Quantum chromodynamics.Quantum field theory.Particles (Nuclear physics)Comunicaciónhttps://doi.org/10.22323/1.069.0023https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es