Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1998-06-09
Acta Phys.Polon. B29 (1998) 2309-2321
Physics
Nuclear Physics
Nuclear Theory
13 pages LaTeX, incl. 5 eps-figures and appb.sty; Talk given at the Workshop on 'The Structure of Mesons, Baryons and Nuclei',
Scientific paper
We discuss the similarities and differences for the theories of Rapp, Wambach and collaborators (called R/W in short) and those based on Brown-Rho scaling (called B/R), as applied to reproduce the dileptons measured by the CERES collaboration in the CERN experiments. In both theories the large number of dileptons at invariant masses $\sim$~$m_\rho/2$ are shown to be chiefly produced by a density-dependent $\rho$-meson mass. In R/W the medium dependence is dynamically calculated using hadronic variables defined in the matter-free vacuum. In B/R scaling it follows from movement towards chiral symmetry restoration due to medium-induced vacuum change, and is described in terms of constituent (or quasiparticle) quarks. We argue that the R/W description should be reliable up to densities somewhat beyond nuclear density, where hadrons are the effective variables. At higher density there should be a crossover to constituent quarks as effective variables scaling according to B/R. In the crossover region, the two descriptions must be ``dual''.
Brown Gerald E.
Li Gu-Qiang
Rapp Ralf
Rho Mannque
Wambach Jochen
No associations
LandOfFree
Medium Dependence of the Vector-Meson Mass: Dynamical and/or Brown-Rho Scaling? 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 Medium Dependence of the Vector-Meson Mass: Dynamical and/or Brown-Rho Scaling?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Medium Dependence of the Vector-Meson Mass: Dynamical and/or Brown-Rho Scaling? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-611664