Below is a first attempt at listing all of the systematic errors we need to calculate and proposed techniques for calculating them.

• QCD rate – maximum variation found in CDF 6636 is 26% for N(jets)>3.  This may be overly conservative.
• Lepton & trigger ID – can be obtained from the R-ratio as done by Sasha.
• MC modelling for soft lepton ID – Some possibilities are
  • Use top selection. Take delta(1 mu) as a starting point for the uncertainty.  See if the difference changes as a function of N(mu) and blow up the error by this slope.
  • Do the single lepton fit using pTrel & S(d0).  Use this as a starting point for the uncertainty.  Blow up by Delta(Nmu) slope obtained from the top selection.
  • Take the maximum variation in N(taggable), pT(taggable), eta(taggable) in the single lepton bin and then feed the difference through the tag rate/mistag matrices.
  • There is expected to be a 5% tracking over efficiency in the MC.  Depending on how we estimate this uncertainty, it may be covered.  If it is not, I can throw out 5% of the tracks (possibly depending on pT) and rerun the prediction.
• Soft muon tag rate –
  • propagate fit errors from J/psi.
  • fit epsilon(pT) in 2 bins of eta and vary fit function.
• Soft muon mistag rate –
  • take largest (Observed-Predicted)/Observed from various jet samples.