1. JES Resolution
Analysis specific
Generic larger issues

2. Asymmetric Errors
0-100

3. JES Resolution [Asymmetry]
This is potentially nasty.
0.5
1.0
This plot is done on all data. No efficient jet cut.

4. Asymmetry
40-60
80-100
60-80
Note:
Asymmetry can
be 1.0 – 1.5.

5. Asymmetry Variable A A
x - 1

6. How Can This Be? Key: Jet [Area ~ Pt] Track connected to PV
Track not connected to PV
Track connected to 2VTX
RECO Muon
corrJCCB
JCCB:
3 jets, two balancing and a small one
corrJCCB:
2 jets, one large and one small
Basically one real jet failed jet quality cuts
Redo insisting #JCCB = #corrJCCB = 2
JCCB

7. Improved Cuts 40-60 y = N exp(Ax3 + Bx2 + Cx): c2/dof = 11/19 = 0.58
Gaussian:
c2/dof = 13.9/20 = 0.70
Improved Cuts
60-80
Asymmetry no
longer a problem
Y = N exp(Ax3 + Bx2 + Cx):
c2/dof = 10/21 = 0.48
Gaussian:
c2/dof = 19.1/21 = 0.91

8. JES v5.3 Energy Resolution (Fixed)

9. JES v5.3 Energy Resolution [Jet QC fixed]
OLD
JES v5.3 Energy Resolution [Jet QC fixed]
NEW
Visible improvement.

10. New and Improved ds/dpt
~Final answer!
Remaining issues:
GeV point.
JT25, guessed threshold
Residual JES issues.
(see next)
D0Note in preparation.
Final to QCD and/or EB imminent.
On to 2VTX land.

11. JES v5.3 STD JES 5.3 gives a 3.8% offset for m-tagged jets.
It is independent of Pt ( GeV). Maybe higher above that. Need to rebin and revisit the idea that the muon Pt may be mis-measured.
Same plot when scaling the m-tagged jets by 3.8%.