Monte Carlo Validation

Goal

To write a package to do streamline Monte Carlo Validation. Action items:

• Things to check for top:
  • W(qq) inv mass
  • W(lnu) inv mass distinguishing the three possible flavors
  • top (qqq) inv mass
  • top (qlnu) inv mass
  • dN/dn_genjet
  • 1st and 2nd associated jet pT and eta
  • branching ratio of ttbar decays (had vs semilep) vs ttbar

• Things to check for Z and W
  • All similar, except the top mass of course.

Users

• ThiagoTomei
• FlaviaDias
• MarcoDias

Procedures

Test files

ttbar+1j

CVS

• Set up CVS:

• Check out the code - make sure to be inside a directory CMSSW_X_Y_Z/src/SomeAnalyzer beforehand!

• Check in the code after making changes.

Links

• http://lcgapp.cern.ch/project/simu/HepMC/HepMC20110/html/classHepMC_1_1GenEvent.html
• http://lcgapp.cern.ch/project/simu/HepMC/HepMC20110/html/classHepMC_1_1GenParticle.html
• http://lcgapp.cern.ch/project/simu/HepMC/HepMC20110/html/classHepMC_1_1GenVertex.html

Log da Flavia

• To reconstruct t and tbar, I located the vertice that have a t (tbar) ingoing, and took the outgoing particles of the vertices. However, some of these top vertices got also other particles than the W and b: uubar, gluon. I've (under Thiago advice) just ignored it and tried to reconstruct the top mass with just W's and b's. Solved: status 2 particles.

• Status stuff - status 2 particles for showering.

• To compile with TFileService, take care to put the lines in the BuildFile in the right place (lines above, not below).

• Successfully reconstructed invariant mass of the W's from hadronic and leptonic decays.

-- ThiagoTomei - 27 Jan 2009 -- FlaviaDias - 28 Jan 2009