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We study the anomalously large rates of some hadronic transitions observed inheavy quarkonia using a constituent quark model which has been successful indescribing meson and baryon phenomenology. QCD multipole expansion (QCDME) isused to described the hadronic transitions. The hybrid intermediate statesneeded in the QCDME method are calculated in a natural, parameter-freeextension of our constituent quark model based on the Quark Confining String(QCS) scheme. Some of the anomalies are explained due to the presence of ahybrid state with a mass near the one of the decaying resonance whereas othersare justified by the presence of molecular components in the wave function.Certain unexpected results are pointed out.

Puzzles in hadronic transitions of heavy quarkonium with two pion emission