QCD Sum Rules and the Lowest-Lying I=0 Scalar Resonance
| dc.creator | Elias, V. | |
| dc.creator | Fariborz, A. H. | |
| dc.creator | Shi, Fang | |
| dc.creator | Steele, T. G. | |
| dc.date | 1997-08-26 | |
| dc.date | 1997-10-21 | |
| dc.date.accessioned | 2026-07-07T09:03:36Z | |
| dc.date.available | 2026-07-07T09:03:36Z | |
| dc.description | A QCD Laplace sum rule framework is employed to investigate the relationship between the mass and the decay width of the sigma, the lowest-lying isoscalar resonance in the spin-zero meson channel. Our analysis differs from prior analyses, not only by incorporating finite-width departures from the narrow resonance approximation, but also through the inclusion of direct-instanton contributions and three-loop-order perturbative effects. Assuming that the sigma is the dominant subcontinuum resonance in this channel, the least upper bound we obtain for the sigma-mass is shown to increase with the sigma-width, and suggests that a sigma lighter than 800 MeV should have a total width substantially smaller than its mass. | |
| dc.description | 8 pages, LaTeX, 4 figures, to appear in the proceedings of MRST 97, few typos corrected | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9708466 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9708466 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/149070 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | QCD Sum Rules and the Lowest-Lying I=0 Scalar Resonance | |
| dc.type | text |