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CC background systematics or “Once more, this time with errors”. Philip Rodrigues Oxford Group Meeting 6/11/07. Error error. MC stats similar to data stats need to add in MC error to c 2 :. Changes best fit point, because. where S CC and S NC are what we’re trying to find.
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CC background systematicsor“Once more, this time with errors” Philip Rodrigues Oxford Group Meeting 6/11/07
Error error • MC stats similar to data stats • need to add in MC error to c2: • Changes best fit point, because where SCC and SNC are what we’re trying to find
Calculating parameter errors Use mean of up/down errors (Dc2=1) as symmetrical error in plots TH2::SetContour(50)
Result – no shower scale • Flatter • More consistent errors • Same NC dip
Shower scale • No evidence for significant shower scale Cutoff in fit at 1.8
Robustness 1 • Still not very robust
Robustness 2 • Still, not too bad considering: • RO pid has smaller lever arm
Conclusions • Results look more convincing with correct errors • Robustness problems remain