= The first !MadAnalysis 5 workshop on LHC recasting @ Korea =
= Analysis 4: CMS-SUS-16-041 =

||= Students =||Byeonghak Ko (Analysis Webpage Editor), Tae Gyu Ro, Jubin Park, Kyeongpil Lee ||  || || || || ||
||= Supervisor(s) =|| Guillaume Chalons || || || || || ||



== 1. Analysis summary ==

Search for new physics n events with at least 3 electrons or muons and jets. Results are based on 35.9 fb^-1^ Luminosity at 13 TeV collected by CMS. Events are classified according to the number of b jets, missing transverse momentum, hadronic transverse energy, and the invariant mass of opposite-charge, same-flavor dilepton pairs. Exclusion limits are set for 4 different simplified SUSY models with gluino or 3^rd^ gen. squarks pair production.

== 2. Analysis global information ==

*  CMS contact person: cms-pag-conveners-susy@cern.ch
*  Center of mass energy: 13 TeV
*  Integrated luminosity: 35.9 fb^-1
*  Link to arXiv: /
*  Link to the collaboration page: http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/SUS-16-041/index.html
*  Link to CDS: http://cds.cern.ch/record/2256435?ln=en
*  Link to Inspire: /
*  Other useful links...

== 3. Selection description ==

=== 3.1 Trigger selection ===

Trigger selections target di- and multilepton events. 

One trigger set requires:
* The two leptons required to meet the loose isolation criteria
* Leading lepton has pT > 23 GeV
* Sub-leading lepton has pT > 8 (12) GeV in the case of muons (electrons)

Second set of triggers requires:
* pT > 8 GeV for both leptons
* HT (hadronic activity) > 300 GeV

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

=== 3.2 Object definition ===

* Jets:
   * clustered with anti-kt algorithm with Delta R = 0.4
   * pT > 30 GeV
   * | eta | < 2.4 

* B-jets: 
   * b-tag efficiency 70%
   * misidentification probability of 10% and 1% is for c- and light-flavor jets, respectively.
   * pT > 25 GeV & | eta | < 2.4

* Hadronic activity
   * HT  = Sum pt of the jets where all jets have pt > 30 GeV

* Muon: | eta | < 2.4

* Electrons: | eta | < 2.5


Explained here how the objects are defined.

=== 3.3 Cut-flow chart ===

=== 3.4 Definition of exotic observables ===

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

== 4. 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? 

== 5. Validation material ==

Contact with CMS established. Waiting for the validation material requested

=== 5.1 Monte-Carlo samples ===

*   LO/NLO? LO
*   Model used: gluino ->  t t +LSP, gluino -> q qbar chi_2/chi_1^±^
*   MC generator program (name + version): PYTHIA 8.???
*   Shower program (name + version): PYTHIA 8.???
*   Tune of Pythia: ???
*   PDF set: 
*   ME/PS merging????

=== 5.2 Reference plots / cut-flows ===

*   List of validation material

* Two outflows for gluino pair production

== 6. Validation results ==

== 7. Reinterpretation (optional) ==

== 8. Questions / issues ==

== 9. Analysis People Contacts == 

* Guillaume Chalons: [mail:guillaume.chalons@th.u-psud.fr] 
* Byeonghak Ko: [mail:quark2930@hotmail.com]
* Tae Gyu Ro: [mail:shxorb234@gmail.com]
* Jubin Park: [mail:honolov77@gmail.com ]
* Kyeongpil Lee: [mail: kplee@cern.ch]