QCD Sum Rules and Vector Mesons in Nuclear Matter
| dc.creator | Klingl, F. | |
| dc.creator | Weise, W. | |
| dc.date | 1997-02-04 | |
| dc.date.accessioned | 2026-07-07T04:01:15Z | |
| dc.date.available | 2026-07-07T04:01:15Z | |
| dc.description | Based on an effective Lagrangian which combines chiral SU(3) dynamics with vector meson dominance, we have developed a model for the s-wave vector meson-nucleon scattering amplitudes. We use this as an input for the low energy part of the current-current correlation function in nuclear matter. Its spectrum enters directly in the ``left hand side'' of QCD sum rules. For the isovector channel we find a significant enhancement of the in-medium spectral density below the $ρ$ resonance while the mass of $ρ$ meson itself decreases only slightly. The situation is different in the isoscalar channel. Here the mass and therefore the peak position of the $ω$ meson decreases strongly while the width increases less drastically than in the $ρ$ meson case. For the $ϕ$ meson we find almost no mass shift, the width of the peak broadens due to the imaginary part of the scattering length. We find a remarkable degree of consistency with the operator product expansion of QCD sum rules in all three channels. | |
| dc.description | 10 pages of LaTeX-2E using axodraw.sty, epsfig.sty; 2 postscript figures included; Proc. of the Int. Workshop XXV, Hirschegg '97, on 'QCD Phase Transitions' | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9702240 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9702240 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/46828 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | QCD Sum Rules and Vector Mesons in Nuclear Matter | |
| dc.type | text |