Rho - Omega Splitting and Mixing in Nuclear Matter

Abstract

We investigate the splitting and mixing of $\rho$ and $\omega$ mesons in nuclear matter. The calculations were performed on the basis of QCD sum rules and include all operators up to mass dimension-6 twist-4 and up to first order in the coupling constants. Special attention is devoted to the impact of the scalar 4-quark condensates on both effects. In nuclear matter the Landau damping governs the $\rho -\omega$ mass splitting while the scalar 4-quark condensates govern the strenght of individual mass shifts. A strong in-medium mass splitting causes the disappearance of the $\rho -\omega$ mixing.

28 pages, 8 figures, Phys. Rev. C 70 (2004) 035207

References in corpus (2)

• In-medium spectral change of omega mesons as a probe of QCD four-quark condensate
• Finite-width QCD sum rules for rho and omega mesons

Cited by in corpus (7)

• D meson mass increase by restoration of chiral symmetry in nuclear matter
• Evidence for In-Medium Changes of Four-Quark Condensates
• The rho meson in a scenario of pure chiral restoration
• Algebraic Approach to Bare Nucleon Matrix Elements
• Matter induced charge symmetry breaking and pion form factor in nuclear medium
• Matter induced charge symmetry violating NN potential
• $\pi$-$\eta$ mixing and charge symmetry violating NN potential in matter