2004/05/31 by Á. Gómez Nicola, A. Gomez Nicola, Felipe J. Llanes–Estrada +3 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1016/j.physletb.2004.12.008
published as Phys.Lett.B606:351-360,2005 · 15 pages, 4 figures, final version to appear in Phys.Lett.B, added references and comments, abstract changed
arxiv created 2004/12/03 · openalex publication_date 2004/12/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We discuss the thermal behaviour of the pion vector form factors and calculate them in one-loop chiral perturbation theory. The perturbative result is used to analyze the T-dependent electromagnetic pion charge radius, obtaining a rough estimate of the deconfinement critical temperature. Imposing thermal unitarity, we generate the ρ resonance pole for the form factor in the center of mass frame. The ρ peak height in the modulus of the form factor decreases for increasing temperature, while its width increases and the peak position is slightly shifted downwards for T≃150 MeV. These results point in the direction suggested by many analysis of dilepton production data in relativistic heavy ion collisions.