Dobado González, AntonioGómez Nicola, ÁngelLlanes Estrada, Felipe JoséPeláez Sagredo, José Ramón2023-06-202023-06-202002-110556-281310.1103/PhysRevC.66.055201https://hdl.handle.net/20.500.14352/58638©2002 The American Physical Society. Work supported by the Spanish CICYT projects, Grant Nos. FPA2000-0956, PB98-0782, and BFM2000-1326. J.R.P. acknowledges support from the CICYT-INFN collaboration, Grant No. 003P 640.15, and E. Oset for useful comments.We study the temperature evolution of the rho and sigma mass and width, using a unitary chiral approach. The one-loop pipi scattering amplitude in chiral perturbation theory at Tnot equal0 is unitarized via the inverse amplitude method. Our results predict a clear increase with T of both the rho and sigma widths. The masses decrease slightly for high T, while the rhopipi coupling increases. The rho behavior seems to be favored by experimental results. In the sigma case, it signals chiral symmetry restoration.engjournal articlehttp://prc.aps.org/abstract/PRC/v66/i5/e055201http://www.aps.orgopen access53Chiral Perturbation-TheoryFinite-TemperaturePion-ScatteringOne-LoopMassFísica (Física)22 Física