The tag/mistag matrices for soft muons had some holes in them due to insufficient statistics at higher pT in the J/psi, D*, and lambda samples.  I did a rough correction for this by fitting the efficiency as a function of pT in 3 eta bins for pions, kaons, protons, and muons separately and then using this fitted function whenever data was unavailable for a particular (pT,eta) bin of the matrix.  The result of this procedure is shown below.

The old tag rate matrix is on the left and the extended one is on the right.  Since we observed that the background prediction is low for the single muon bin and the data excess grows as a function of pTrel, I was hoping that filling these holes in the tag rates would fix some of this discrepancy.

The number of absolutely predicted SM background events in the single muon bin is now N(bg,W)=5386 for the W and N(bg,Z)=340.  Before the tag rate matrix extension, these numbers were N(bg,W)=5145 and N(bg,Z)=304.

The pTrel plots now look like this.

There is still an excess, but it climbs more slowly with respect to pTrel than before.  We can see this clearly if we compare the data/MC ratio plot to the one obtained before the tag rate extension.