wiki:Korea2017-05-CMS-EXO-16-052

Version 15 (modified by Sangman Lee, 7 years ago) ( diff )

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The first MadAnalysis 5 workshop on LHC recasting @ Korea

Analysis 5: CMS-EXO16-052

Students Jeon Dajeong (djeon@…) , Kim Seulgi (pikachu602@…), Lee Sang Man(daniel.s.lee4@…), Watson Ian James (ian.james.watson@…)
Supervisor(s) Sam Bein, Jory Sonneveld

1. Analysis summary

2l+MET

2. Analysis global information

https://github.com/cms-sw/genproductions/tree/master/python/ThirteenTeV

3. Selection description

3.1 Trigger selection

PS: This part cannot usually be described by the fast-simulation of detector.

3.2 Object definition

Explained here how the objects are defined.

3.3 Cut-flow chart

Event Selection:

  • Two same flavored lepton with opposite electric charge ( that pass lepton selection?)
  • el[0] pt > 25 and el[1] pt >20
  • mu[0] pt > 20 and mu[1] pt > 20
  • dilep m = 91.1876( +- 0.0021) +- 15
  • dilep pt > 60
  • events having more than one jet with pT > 30 GeV - remove
  • b-tagged jet Veto : at least one bjet pt > 20, |eta| < 2.4 - remove
  • if el[2 onwards] pt > 10 -remove
  • if mu[2 onwards] pt > 5 -remove
  • if tau pt >18 - remove

Optimization: For each possible set of selections the full analysis, including the estimation of backgrounds from control samples in data and the systematic uncertainties, is repeated.

After optimization:

  • MET > 100
  • Delta phi ( dilep.pt , ptmiss) > 2.6 rad
  • |MET - dilep.pt| / dilep.pt < 0.4

3.4 Definition of exotic observables

Like SUSY transverse observable. Notice that classical MT2 & MT2W are encoded within the MadAnalysis framework.

3. Detector simulation

Can we use the last release of the Delphes package with the CMS/ATLAS MA5tune-card? or do need to improve the simulation?

4. Validation material

4.1 Monte-Carlo samples

  • LO/NLO?
  • Model used:
  • MC generator program (name + version):
  • Shower program (name + version):
  • Tune of Pythia:
  • PDF set:
  • ME/PS merging????

4.2 Reference plots / cut-flows

4. Validation results

5. Reinterpretation (optional)

6. Questions / issues

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