Joint description of the e+e- annihilation into both four-pion channels
| dc.creator | Juran, Josef | |
| dc.creator | Lichard, Peter | |
| dc.date | 2008-02-28 | |
| dc.date | 2008-06-30 | |
| dc.date.accessioned | 2026-07-07T11:48:45Z | |
| dc.date.available | 2026-07-07T11:48:45Z | |
| dc.description | The e+e- --> pi+pi-pi0pi0 reaction cross section as a function of the incident energy is calculated using a model that is an extension of our recently published model of the e+e- annihilation into four charged pions. The latter considered the intermediate states with the pi, rho, and a_1 mesons and fixed the mixing angle of the a_1-rho-pi Lagrangian and other parameters by fitting the cross section data. Here we supplement the original intermediate states with those containing omega(782) and h_1(1170), but keep unchanged the values of those parameters that enter both charged and mixed channel calculations. The inclusion of omega is vital for obtaining a good fit to the cross section data, while the intermediate states with h_1 further improve it. Finally, we merge our models of the e+e- --> pi+pi-pi0pi0 and e+e- --> pi+pi-pi+pi- reactions and obtain a simultaneous good fit. | |
| dc.description | 4 pages, 4 figures, fit to new experimental data | |
| dc.identifier | https://arxiv.org/abs/0802.4229 | |
| dc.identifier | http://arxiv.org/abs/0802.4229 | |
| dc.identifier | Phys.Rev.D78:017501,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.017501 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/202992 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Joint description of the e+e- annihilation into both four-pion channels | |
| dc.type | text |