1997/02/04 by F. Klingl, Klingl, F., W. Weise +1
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9702240
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'
arxiv created 1997/02/04 · openalex publication_date 1997/02/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.