QCD Sum-Rule Invisibility of the sigma Meson
| dc.creator | Steele, T. G. | |
| dc.creator | Shi, Fang | |
| dc.creator | Elias, V. | |
| dc.date | 1999-05-11 | |
| dc.date.accessioned | 2026-07-07T04:07:03Z | |
| dc.date.available | 2026-07-07T04:07:03Z | |
| dc.description | QCD Laplace sum-rules for light-quark I=0,1 scalar currents are used to investigate candidates for the lightest $q\bar q$ scalar mesons. The theoretical predictions for the sum-rules include instanton contributions which split the degeneracy between the I=0 and I=1 channels. The self-consistency of the theoretical predictions is verified through a Hölder inequality analysis, confirming the existence of an effective instanton contribution to the continuum. The sum-rule analysis indicates that the f_0(980) and a_0(1450) should be interpreted as the lightest $q\bar q$ scalar mesons. This apparent decoupling of the f_0(400-1200) (or $σ$) and a_0(980) from the quark scalar currents suggests a non-$q\bar q$ interpretation of these resonances. | |
| dc.description | 6 pages, latex. Talk at the Workshop on Hadron Spectroscopy, WHS'99, Frascati, March 1999 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9905303 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9905303 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/49005 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | QCD Sum-Rule Invisibility of the sigma Meson | |
| dc.type | text |