Current correlation functions, QCD sum rules and vector mesons in baryonic matter

Details Current correlation functions, QCD sum rules and vector mesons in baryonic matter Current correlation functions, QCD sum rules and vector mesons in baryonic matter

1997-04-24

arxiv.org/abs/hep-ph/9704398v1

Nucl.Phys.A624:527-563,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

40 pages, LaTeX 2e,10 figures in eps , submitted to Nucl.Phys.A

Scientific paper

10.1016/S0375-9474(97)88960-9

Based on an effective Lagrangian which combines chiral SU(3) dynamics with vector meson dominance, we have developed a model for the forward vector meson-nucleon scattering amplitudes. We use this as an input to calculate 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 rho resonance while the rho meson mass itself changes only slightly. The situation is different in the isoscalar channel, where the mass and peak position of the omega meson move downward while its width increases less drastically than in the rho meson case. For the phi meson we find almost no mass shift; the width of the peak broadens moderately. We observe a remarkable degree of consistency with the operator product expansion of QCD sum rules in all three channels. We point out, however, that these results cannot simply be interpreted, as commonly done, in terms of a universal rescaling of vector meson masses in matter.

Affiliated with

Also associated with

No associations

Rating

Current correlation functions, QCD sum rules and vector mesons in baryonic matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Current correlation functions, QCD sum rules and vector mesons in baryonic matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current correlation functions, QCD sum rules and vector mesons in baryonic matter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-268501