The Off Shell $ρ$-$ω$ Mixing in the QCD Sum Rules

Hatsuda, T.; Henley, E. M.; Meissner, Th.; Krein, G.

The Off Shell $ρ$-$ω$ Mixing in the QCD Sum Rules

Authors

Description

The $q^2$ dependence of the $ρ-ω$ mixing amplitude is analyzed with the use of the QCD sum rules and the dispersion relation. Going off shell the mixing decreases, changes sign at $q^2 \simeq 0.4 m_ρ^2 > 0$ and is negative in the space like region. Implications of this result to the isospin breaking part of the nuclear force are discussed.
26 pages + 11 figures (PostScript)