omega ->rho pi transition and omega -> 3 pi decay - art. no. 034013

We evaluate the omega-->rho pi transition and the omega-->3 pi decay using a quark level linear sigma model (QL sigma M). We obtain g(omega rho pi)(QL sigma M)=(10.33-14.75) GeV-1 to be compared with other model dependent est imates averaging to g(omega rho pi) = 16 GeV-1. We show that in the QL sigm a M a contact term is generated for the omega-->3 pi decay. Although the co ntact contribution by itself is small, the interference effects turn out to be important.