Including final-state meson widths in the phase space of nonleptonic D decays changes some flavor-SU(3) branching-ratio predictions, most notably boosting D0 to K*0 eta' far above the experimental upper limit.
Charmed meson decays to two pseudoscalars
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abstract
A recent update of data on the decays of $D^0$, $D^+$, and $D_s^+$ to pairs of light pseudoscalars calls for a renewed analysis of key decay amplitudes and tests of flavor symmetry. The present data change our previous understanding of relative phases between amplitudes that describe Cabibbo-favored decays of the charmed mesons. The new data also seem to favor a smaller octet-singlet mixing angle for the $\eta$ and $\eta'$ mesons when singly-Cabibbo-suppressed processes are taken into account. We also discuss the effects of the new data on interference between Cabibbo-favored and doubly-Cabibbo-suppressed decays.
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Finite width effects in nonleptonic D-decays
Including final-state meson widths in the phase space of nonleptonic D decays changes some flavor-SU(3) branching-ratio predictions, most notably boosting D0 to K*0 eta' far above the experimental upper limit.