ATLAS Support Center

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

<note important>This page was created during the DPF2013 studies. All truth-level MC samples have been moved to 
[[http://atlaswww.hep.anl.gov/hepsim/ | the HepSim Monte Carlo repository]]
</note>


===== Fast Monte Carlo simulation for Snowmass2013 =====
Here are top-quark "signal" samples generated by requests for Snowmass 2012-2013.
Samples are generated using  ANL ATLAS Tier3 computer farm based on 
[[http://atlaswww.hep.anl.gov/asc/arcond/ |Arcond/Condor]]. Details about the Delphes samples for Snowmass are given in [[http://www.snowmass2013.org/tiki-index.php?page=Energy_Frontier_FastSimulation| this wiki]].

  * [[https://cp3.irmp.ucl.ac.be/projects/delphes | Delphes 3.09]]. Use  Delphes 3 reference [[http://arxiv.org/abs/1307.6346]]
  * 14 TeV pp collision energy.
  * The Snowmass detector geometry [[http://mc.hep.anl.gov/asc/snowmass2013/delphes36/?dir=packages | See "updateMay8" input cards]]
  * PFlow jets with jet  area correction.
  * Each sample is generated for **<mu>=0,50,140 pileup** pileup scenarios (soft events are generated with HERWIG++)

One can view and browser directories with all simulated samples using the [[http://mc.hep.anl.gov/asc/snowmass2013/delphes36/| ANL Monte Carlo repository]]. 
Here is a detailed description:

  - **[[snowmass2013:montecarlo_d36 | HERWIG++  for low pT  ttbar]]**
  - **[[snowmass2013:montecarlo_d36pt650 | HERWIG++  for ttbar with pT>650 GeV]]**
  - **[[snowmass2013:montecarlo_d36pt650_dijet | HERWIG++  for QCD dijets with pT>650 GeV]]** <fc #FF0000>New</fc>
  - **[[snowmass2013:montecarlo_d36pt650cal2 | HERWIG++  for ttbar with pT>650 GeV]]** (finer CAL segmentation in Phi only)
  - **[[snowmass2013:montecarlo_d36pt1500top | HERWIG++  for ttbar with pT>1500 GeV]]** (finer CAL segmentation)
  - **[[snowmass2013:montecarlo_d36pt1500dijetcal2 | HERWIG++  for dijets with pT>1500 GeV]]** (finer CAL segmentation)
  - **[[snowmass2013:montecarlo_d36pt1500 | HERWIG++  for ttbar with pT>1.5 TeV]]**
  - **[[snowmass2013:montecarlo_d36zprime3000 | PYTHIA8  for Zprime(3000) to ttbar]]**
  - **[[snowmass2013:montecarlo_d36httbar | PYTHIA8  for H0+ttbar]]** 
  - **[[snowmass2013:montecarlo_tchannel | MG5+PYTHIA  for single-top (t-channel)]]**
  - **[[snowmass2013:montecarlo_tW | MG5+PYTHIA  for single-top (tW-channel)]]**
  - **[[snowmass2013:montecarlo_d36jahred | Madgraph+Pythia samples]]** <fc #FF0000>New</fc>
      - ttbar+1 gamma
      - ttbar+2 gamma
      - W+2 gamma
      - Z+2 gamma
      - ttbar+H-> 2 gamma
    - **[[snowmass2013:montecarlo_d36loginov | Madgraph+Pythia samples for Higgs+ttbar]]** <fc #FF0000>New</fc>
      - ttbar->dileptons
      - ttbar->lepton+jet
      - W+2 gamma
      - Z+2 gamma
   - **[[snowmass2013:montecarlo_d36ponyisi | Madgraph+Pythia samples for Higgs+ttbar (different channels)]]** <fc #FF0000>New</fc>
      - ttWW + up to 1 parton
      - ttH, H -> tau tau
      - tt + ll + up to 2 partons, dilepton invariant mass >= 10 GeV
      - ttH, H -> ZZ, generic Z decay + up to 1 parton
      - ttW + up to 3 partons, generic W decay
      - ttH, H->WW + up to 1 parton, generic W decay

**Warning: most of the models are at the LO level (HERWIG/Pythia8) or with some NLO corrections (Madgraph). You should apply a k-factor to get a correct normalization (can be a phase-space dependent).**


Background samples are discussed in [[http://www.snowmass2013.org/tiki-index.php?page=NPBackgroundSamplesTwiki|Background Samples Twiki]]. 

<note important>Last re-processing was on June 8 using Delphes 3.09, 2013 (fixed bug for mu=0 samples). We did not change directory file names to make the output consistent with the download scripts</note>

===== Truth MC records====

Truth MC record was removed from the Delphes files to reduce file size. Below you can find a repository with truth MC information: signal, signal+pileup (<mu>=50) and signal+pileup(<mu>=140). Pileup particles are included.

**[[snowmass2013:montecarlo_truth | Repository with truth MC information]]**

**[[http://atlaswww.hep.anl.gov/hepsim/ | HepSim Repository with Monte Carlo predictions for HEP]]** <fc #FF0000>New</fc>

===== 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 files
  * **[[snowmass2013:analyse_d36_promc| How to read Delphes data without ROOT]]** link explains how to analyze Delphes outputs without ROOT (and C++)
  * **[[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



=====  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 [[http://atlaswww.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>

=====  ATLAS-like detector =====

[[http://mc.hep.anl.gov/asc/snowmass2013/atlas/ | Here ]] are the samples for ATLAS-like fast simulation using Delphes 3.03 without pileup removal.

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

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


=====  Snowmass "white" paper based on these samples =====

The SVN link to the white paper is [[https://subversion.assembla.com/svn/detectors_top/trunk/| here]]. 
You may need to get the [[https://www.assembla.com/|Assembla account]] and contact me to allow the access.


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