Effect of pion thermal width on the sigma spectrum

• Main Authors: Hidaka, Yoshimasa, Morimatsu, Osamu, Nishikawa, Tetsuo, Ohtani, Munehisa
• Format: Journal Article
• Language: English
• Published: 22.04.2003
• Subjects: Physics - High Energy Physics - Phenomenology

Phys.Rev. D68 (2003) 111901 We study the effect of thermal width of $\pi$ on the spectral function of $\sigma$ applying a resummation technique called optimized perturbation theory at finite temperature ($T$) to ${\cal O}(4)$ linear sigma model. In order to take into account finite thermal width of...