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

• CMS contact person: Nicholas Charles Smith
• Center of mass energy: 13 TeV
• Integrated luminosity: 35.9 fb−1
• Link to arXiv: none
• Link to the collaboration page: ​http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/EXO-16-052/
• Link to CDS: ​http://cds.cern.ch/record/2264690?ln=en
• Link to Inspire: ​http://inspirehep.net/record/1599663
• Other useful links...

​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

If event has one jet:

• Delta phi (jet.pt , ptmiss ) > 0.5
• Delta R(ll) < 1.8

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

• ​http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/EXO-16-052/CMS-PAS-EXO-16-052_Table_004.png

4. Validation results

5. Reinterpretation (optional)

6. Questions / issues