GAMMA-Z INTERFEROMETRY AT A PHI-FACTORY

We analyze the possibilities that the proposed Phi-factories offer to measure gamma-Z interference. In the unpolarized beam case, we study d ifferent signatures in the rho pi channel, taking advantage of the pre sence of the nearby alpha(1) resonance. We build a C-odd forward-backw ard asymmetry, estimated to be around 10(-5), and (P-even, T-even) and (P-odd, T-odd) alignments of the rho, to be seen from the angular dis tribution of its pi pi decay products. With polarized electrons a left -right asymmetry around 2 x 10(-4) is present in all channels. At lead ing order this asymmetry is independent of hadronic matrix elements an d is sensitive to the Z(0)-s (s) over bar vector coupling. In the rho pi channel, a combined left-right forward-backward asymmetry is consid ered.