Effect of pion thermal width on the sigma spectrum
| dc.creator | Nishikawa, Tetsuo | |
| dc.creator | Hidaka, Yoshimasa | |
| dc.creator | Ohtani, Munehisa | |
| dc.creator | Morimatsu, Osamu | |
| dc.date | 2003-10-27 | |
| dc.date.accessioned | 2026-07-07T03:50:58Z | |
| dc.date.available | 2026-07-07T03:50:58Z | |
| dc.description | We study the effect of the thermal width of $π$ on the spectral function of $σ$. In order to take into account a finite thermal width of $π$, we replace the internal pion mass in the self-energy of $σ$ with that of the complex pole found in a previous paper. The obtained spectral function for $T\aplg 100 {\rm MeV}$ turns out to possess two broad peaks. Although a sharp peak at $σ\toππ$ threshold was observed in the one-loop calculation without the pion thermal width, the peak is shown to be smeared out. We also search for the poles of the $σ$ propagator and analyze the behavior of the spectral function with these poles. | |
| dc.description | Contribution to the International Workshop on QCD: QCD@Work 2003 - Conversano (Italy) 14-18 June 2003 (eConf C030614) | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0310296 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0310296 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/42972 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Effect of pion thermal width on the sigma spectrum | |
| dc.type | text |