On the two-photon decay width of the sigma meson
| dc.creator | Giacosa, Francesco | |
| dc.creator | Gutsche, Thomas | |
| dc.creator | Lyubovitskij, Valery E. | |
| dc.date | 2007-10-17 | |
| dc.date | 2008-03-12 | |
| dc.date.accessioned | 2026-07-07T11:12:21Z | |
| dc.date.available | 2026-07-07T11:12:21Z | |
| dc.description | We shortly report on the two-photon decay width of the light $σ$-meson interpreted as a quarkonium state. Results are given in dependence on the $σ$-mass and the constituent mass of the light quark. The triangle quark-loop diagram, responsible for the two-photon transition, is carefully evaluated: a term in the transition amplitude, often omitted in literature, results in destructive interference with the leading term. As a result we show that the two-photon decay width of the $σ$ in the quarkonium picture is less than 1 keV for the physical range of parameters. | |
| dc.description | 6 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0710.3403 | |
| dc.identifier | http://arxiv.org/abs/0710.3403 | |
| dc.identifier | Phys.Rev.D77:034007,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.77.034007 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/191353 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | On the two-photon decay width of the sigma meson | |
| dc.type | text |