RT Journal Article
T1 Thermal rho and sigma mesons from chiral symmetry and unitarity
A1 Dobado González, Antonio
A1 Gómez Nicola, Ángel
A1 Llanes Estrada, Felipe José
A1 Peláez Sagredo, José Ramón
AB 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.
PB Amer Physical Soc
SN 0556-2813
YR 2002
FD 2002-11
LK https://hdl.handle.net/20.500.14352/58638
UL https://hdl.handle.net/20.500.14352/58638
LA eng
NO ©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.
NO Spanish CICYT
NO CICYT-INFN
DS Docta Complutense
RD 6 abr 2025