I have produced the envelopes of the systematics for the B->Dlnu and the
D->X branching fractions for the three main quantities: Mx,mm2 and total
charge. The results are in
http://babar.roma1.infn.it/~faccini/Dsys_plots.html#envelopes
I would say that any difference in Mx is well accounted by these changes,
while mm2 and qtot are basically unaffected
ciao
ric
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