2026-06-27T23:12:10Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/586382023-08-27T02:49:39Zcom_20.500.14352_14col_20.500.14352_15

Dobado González, Antonio Gómez Nicola, Ángel Llanes Estrada, Felipe José Peláez Sagredo, José Ramón 2023-06-20T18:47:44Z 2023-06-20T18:47:44Z 2002-11 0556-2813 10.1103/PhysRevC.66.055201 https://hdl.handle.net/20.500.14352/58638 http://prc.aps.org/abstract/PRC/v66/i5/e055201 http://www.aps.org 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. eng open access Thermal rho and sigma mesons from chiral symmetry and unitarity journal article