JES Resolution

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# JES Resolution - PowerPoint PPT Presentation

JES Resolution. Analysis specific Generic larger issues. Asymmetric Errors. 0-100. 160-500. 100-160. JES Resolution [Asymmetry]. This is potentially nasty. 0. 0.5. 1.0. This plot is done on all data. No efficient jet cut. 80-100. 40-60. Asymmetry. 100-160. 60-80. Note:

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## PowerPoint Slideshow about 'JES Resolution' - jakeem-mooney

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Presentation Transcript
JES Resolution
• Analysis specific
• Generic larger issues
Asymmetric Errors

0-100

160-500

100-160

JES Resolution [Asymmetry]

This is potentially nasty.

0

0.5

1.0

This plot is done on all data. No efficient jet cut.

80-100

40-60

Asymmetry

100-160

60-80

Note:

Asymmetry can

be 1.0 – 1.5.

Key:

Jet [Area ~ Pt]

Track connected to PV

Track not connected to PV

Track connected to 2VTX

RECO Muon

How Can This Be?

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

40-60

Improved Cuts

y = N exp(Ax3 + Bx2 + Cx):

c2/dof = 11/19 = 0.58

Gaussian:

c2/dof = 13.9/20 = 0.70

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

New and Improved ds/dpt

• Remaining issues:
• 90-100 GeV point.
• JT25, guessed threshold
• Residual JES issues.
• (see next)
• D0Note in preparation.
• Final to QCD and/or EB imminent.
• On to 2VTX land.
JES v5.3

STD JES 5.3 gives a 3.8% offset for m-tagged jets.

It is independent of Pt (75-250 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%.