Using the helicity amplitude method, the authors derive the angular distribution for vector-to-pseudoscalar semileptonic decays and predict polarization observables for J/psi and Upsilon(1S) channels.
On Some rare weak decays of vector mesons
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abstract
Some semileptonic weak decays of vector mesons are considered in the framework of the most popular quark models. The predicted branching ratios are unfortunately too small to make a study of these decays realistic at meson factories under construction.
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Polarization observables in semileptonic $V\to P$ decays of quarkonia
Using the helicity amplitude method, the authors derive the angular distribution for vector-to-pseudoscalar semileptonic decays and predict polarization observables for J/psi and Upsilon(1S) channels.