Difference: JetCalibrationTTBarEvents (3 vs. 4)

Revision 42010-01-21 - AndreaMassironi

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META TOPICPARENT name="AndreaMassironi"

Jets calibration using $t\bar{t}$ events

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\[ k' = k \frac{M_{W}}{M_{RECO fit}} \]
This method is iterative, that is many k updates are required to k values to converge.
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imgbc596787fd4a2b285b2fea1bc3cd3702.png
pT Reco / pT MC vs η. Gauss fit mean superimposed.
img54c973c5daafdd92ba0d0f739df0eff7.png
pT Reco / pT MC vs pT Reco.
imgfd6e1a0548f795e4c289747061e8911a.png
Reco invariant mass vs pT.
img44e18dd700c1879e65516c23f73d9c1a.png
Reco invariant mass. Red = before jet corrections, Green = after jet corrections

SL3: Squared L3
As L3 method, but with the ratio of the masses instead of the squared ratio
\[ k' = k \frac{\sum \frac{M_{W}}{M_{RECO} } }{N} \]
then the "dimension" of the correction is proportional to k and convergence is reached.
 
img9e49dba45b3e3ff5bad3154fda34dafd.png
pT Reco / pT MC vs η. Gauss fit mean superimposed.
imgfa34f5e3424d3dbed657059e8e744744.png
pT Reco / pT MC vs pT Reco.
img117e26bc3f5861a036be3f430fb2812c.png
Reco invariant mass vs pT.
 
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