Rho - Omega Splitting and Mixing in Nuclear Matter

Details Rho - Omega Splitting and Mixing in Nuclear Matter Rho - Omega Splitting and Mixing in Nuclear Matter

2004-04-21

arxiv.org/abs/hep-ph/0404176v5

Phys.Rev.C70:035207,2004; Erratum-ibid.C70:049901,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevC.70.035207

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.

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