HADRONIC TRANSITIONS AMONG QUARKONIUM STATES IN A SOFT-EXCHANGE-APPROXIMATION - CHIRAL BREAKING AND SPIN SYMMETRY-BREAKING PROCESSES

Although no asymptotic heavy quark spin symmetry, and even more no fla vor symmetry, are expected for systems such as quarkonium, a numerical discussion shows that for some processes and in a preasymptotic regio n which may roughly include charmonium and bottomonium, the use of the spin-symmetry may be useful in conjunction with chiral symmetry for l ight hadrons (soft-exchange-approximation regime, SEA). We continue ou r discussion of hadronic transitions in the SEA-regime by studying in particular chiral breaking transitions such as 3P' --> 3Ppi0, 3Peta, l evel splittings and transitions which break both chiral and spin symme try, such as psi' --> J/psipi0, J/psieta, and P-1(1) --> J/psipi0.