Dipole Moments of the Rho Meson

Abstract

The electric and magnetic dipole moments of the rho meson are calculated using the propagators and vertices derived from the QCD Dyson-Schwinger equations. Results obtained from using the Bethe-Salpeter amplitude studied by Chappell, Mitchell and Tandy, and Pichowsky and Lee, are compared. The rho meson EDM is generated through the inclusion of a quark electric dipole moment, which is left as a free variable. These results are compared to the perturbative results to obtain a measure of the effects of quark interactions and confinement. The two dipole moments are also calculated using the phenomenological MIT bag model to provide a further basis for comparison.

31 pages, RevTeX, 2 figures, uses psfig. Replacement of results using amplitude/propagator from paper by Mitchell et.al. with those from more recent paper by Mitchell and Tandy. Minor modification of tables 1 and 2. Explanation of proof of current conservation added. Expanded discussion of quark propagators and confinement. To be published in Phys. Rev. C

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