Rho - omega mixing in chiral perturbation theory

Abstract

In order to calculate the rho - omega mixing we extend the chiral couplings of the low-lying vector mesons in chiral perturbation theory to a lagrangian that contains two vector fields. We determine the momentum dependence of the two-point function and recover an earlier result for the on-shell expression. We discuss the off-shell behaviour of the mixing.

Comments: Latex, 12 pages. The paper is also available via anonymous ftp at (129.13.102.139) ftp://ttpux2.physik.uni-karlsruhe.de/ttp95-08/ttp95-08.ps, or via www at http://ttpux2.physik.uni-karlsruhe.de/cgi-bin/preprints/