April 8th

Questions...

• when looking at pt, px ditributions, to plot them on the same histo, what should be (if any) be the scale factor ?

More... Close If we had 2 exact same phenomena, following a gaussian law, but with different number of events, they would look "different", only because of stat (since sigma ~sqrt(N). So, 1st guess, need to normalize to the same # of entries. However, MET/x is a random walk...with non constant step...so ? (maybe ill-phrased but if I'd be able to phrase it properly, I'd have the solution :s)

April 4th

sample : QCD_Pt_15to3000_TuneZ2_Flat_7TeV_pythia6_Spring11-PU_S1_START311_V1G1-v1 (flat to 10 PU, in-time only).

Vertices

* vertices distributions :

DA : deterministic annealing. Should be the default as of 420_pre7.

Vertices versus number of pile-up interactions : "old" reco vertices, good (= isFake && ndof > 4 && abs(z) <= 24 && position.Rho <= 2) old reco vertices, reco vertices with DA, good reco vertices with DA)

....MC : plots wrt PU vertices (at least for now). looks like a cut on the number of pile-up vertices ??

MET distributions

....to be attached later.

MET vs PU

* sigma(MET,x) vs PU for different METs:

hmm...I screwed up...:(

March 28

Code (update April 4th) :

   cvs co -r V00-01-04  CommonTools/ParticleFlow   
   rm CommonTools/ParticleFlow/python/pfTaus_cff.py   
   emacs -nw CommonTools/ParticleFlow/python/PF2PAT_cff.py   
   cvs co RecoJets/JetAnalyzers    
   cvs co -r V01-04-04 RecoVertex/PrimaryVertexProducer  
   cvs co -d METsWithPU/METsAnalyzer/ UserCode/lucieg/METsWithPU/METsAnalyzer/ 

• 1) need head so that pfNoPileUp doesn't crash on assert() when 2 vtces found for the same track & ...
• 2) doesn't compile (relevant though ?)
• 3) comment out tau parts
• 4) PFJetsSelector (should check a tag to get rather than head...)
• 5) offline primary vertices with deterministic annealing

March 27

• new QCD samples QCD_Pt_15to3000_TuneZ2_Flat_7TeV_pythia6_Spring11-PU_S1_START311_V1G1-v1 (in-time only PU ? to be checked)
• !!! 3_11_1 : keep PileupSummaryInfo_*_*_*, now, with 3_11_3 : keep PileupSummaryInfos_*_*_*

• nr of reco vertices with deterministic annealing (...) vs nr of pile-up interactions, nr of "old-fashioned" reco vertices vs nr of pile-up interactions, nr of pixel vertices (out of curiosity) vs nr of pile-up interactions

• still need to check on FastSim (but weird distrib with 3_11_1...),...

March 21

Trying to move to offline primary vertices with deterministic annealing (...)

* n reco vtces with DA vs # PU, QCD (! OOT PU info not there ):

March 16

FastSim QCD Pt 15-500, COM 7TeV, Startup Conditions 10k events/PU, for = 0, 5, 10, 15, 20 (25)

# reco vertices vs # PU vertices

* # of reco vertices vs # PU vertices, FastSim:

Pt distribution, for different #PU vertices

• standard pf met and pfmet with no pile up pf candidates only:
  

Pt,x distribution, for different #PU vertices

• standard pf met and pfmet with no pile up pf candidates only
  

sigma(Pt,x distribution), standard PFMET, as a function of #PU vertices

• sigma(pt, x) pfmet & pfmet npu:
  

/QCD_Pt_15to3000_TuneZ2_Flat_7TeV_pythia6/Spring11-E7TeV_FlatDist10_2011EarlyData_50ns_START311_V1G1-v1/GEN-SIM-RECODEBUG

# reco vertices vs #PU vertices

* #PU vertices distribution and # reco PV vs # PU vertices :

Pt distribution, for different #PU vertices

* standard pf met, pf met with no pile up pf candidates only:

Pt,x distribution, standard PFMET, for different #PU vertices

* standard pf met, pf met with no pile up pf candidates only:

sigma(Pt,x distribution), standard PFMET, as a function of #PU vertices

* sigma(pt, x) pfmet & pfmet npu:

TO DO LIST :

• add type I corrections (ok for std PFMET, not yet for NPU)
• ...

-- LucieGAUTHIER - 16-Mar-2011