Comparing D0 Decay Rates: K(-) + (pi)(+) vs. K(-) + e(+) + (v_e)

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The discussion centers on the comparative decay rates of D0 mesons into two different final states: K(-) + (pi)(+) and K(-) + positron + electron-flavor neutrino. Participants note that both decay processes exhibit similar branching fractions, but differences in phase space may influence their likelihood. The conversation references the Particle Data Group (PDG) tables for detailed decay information, emphasizing the importance of understanding Cabibbo suppression in these decay processes.

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holly56
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Which of the following should occur at a greater rate: D0 to K(-) + (pi)(+) OR D0 to K(-) + positron + electron-flavor neutrino?
I know that there are other decays that are Cabibbo supressed (or doubly so) but I can't see what would make one of these more likely than the other.
Thanks
 
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I think the pdglive-tables are easier to use:
http://pdglive.lbl.gov/Rsummary.brl?nodein=S032&inscript=Y&sub=Yr&return=MXXX035

They have a similar branching fraction, and the different phase space can lead to differences.
 
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