[[snowmass2013:montecarlo| <<back]]

===== Fast Monte Carlo simulation for Snowmass2013 =====


==== Monte Carlo ttbar samples using ATLAS geometry ====
Below are ttbar and background MC samples generated for pp collisions at 14 TeV

  - **[[snowmass2013:montecarlo_d2 | Delphes2.03]]  for  PYTHIA8 and HERWIG++ for high-pT ttbar and high-pT QCD jets (without pileup)**
  - **[[snowmass2013:montecarlo_d3b | Delphes3.0 beta]]  for PYTHIA8.   ttbar  without pileup**

14 TeV pp events, Delphes3.05 and ATLAS-like geometry card with antiKT R=0.5  ("pflow" as input)

  - **[[snowmass2013:montecarlo_d3 | HERWIG++  for low pT ttbar signal and signal+pileup  (140 soft events)]], 31 pb-1**
  - **[[snowmass2013:montecarlo_d3pt650 | HERWIG++  for high pT ttbar (pT>650 GeV) signal and signal+pileup (140 soft events)]], 14.5 fb-1**
  - **[[snowmass2013:montecarlo_d3pt1800 | HERWIG++  for high pT ttbar (pT>1800 GeV) signal]], 140.5 fb-1**
  - **[[snowmass2013:montecarlo_d3mu140f | HERWIG++ pileup events  for the signal events used in (1) and (2)]]**
  - **[[snowmass2013:montecarlo_d3mu50 | HERWIG++  for low pT ttbar signal and signal+pileup  (50 soft events)]], 31 pb-1**
  - **[[snowmass2013:montecarlo_d3pt650mu50 | HERWIG++  for high pT ttbar (pT>650 GeV) signal and signal+pileup (50  soft events)]], 14.5 fb-1**
  - **[[snowmass2013:montecarlo_d3zprime3000 | PYTHIA8  for Zprime(3000) to ttbar with  mu=0,50,140 pileups]]**
  - **[[snowmass2013:montecarlo_d3singletop | PYTHIA8  for single top (s- and t- channels) with  mu=0,50,140 pileups]]**


===== Help for analyzers====


  * **[[snowmass2013:download| How to download]]** link shows an automatic way of copying the ROOT files from this server
  * **[[snowmass2013:analyse_d3| How to analyze]]** link explains how to analyze Delphes3  ROOT format
  * **[[snowmass2013:analyse_d36_promc| How to analyze without ROOT]]** link explains how to analyze Delphes outputs without ROOT
  * **[[snowmass2013:analyse_slim_d3| What slims are used]]** link explains what was done to reduce Delphes output
  * **[[snowmass2013:pileup_truth_d3| Accessing truth particles from signal events]]** link explains how to access truth particles ignoring pileup
  * **[[snowmass2013:howto_d3| How to generate MC samples]]** link explains how to generate fast simulation events with pileups
  * **[[snowmass2013:howto_d3_objects| How to access objects]]** link explains how to access jets, leptons, missing ET
  * **[[snowmass2013:howto_d3_jets| How to correct jets for pileup]]** link explains how to apply offset correction for pileup



=====  Help for Delphes developers =====

You can add a new deatures to Delphes using this test HEPMC record. 
Download a HEPMC file with ttbar (>650 GeV, 14 TeV) for Delphes. Get it from here [[https://mc.hep.anl.gov/asc/snowmass2013/delphes3/ttbar_pt650/hepmc/LHC_signal_ttbar650.hepmc.gz| LHC_signal_ttbar650.hepmc.gz]]. Test Delphes as:

<code bash>
gunzip LHC_signal_ttbar650.hepmc.gz
DelphesHepMC examples/delphes_card_ATLAS.tcl LHC_ttbar650.root LHC_signal_ttbar650.hepmc
</code>

=====  Other samples =====

Other samples which without pileup and with pileup (keeping all final state particles) are discussed 
[[snowmass2013:delphes2 | here ]]


 --- //[[chekanov@anl.gov|Sergei Chekanov]] 2013/03/06 20:47//
--- //[[sacha.vaniachine@cern.ch|Alexandre Vaniachine]] 2013/03/06 20:47//