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--- snowmass2013:montecarlo_d36httbar [2013/05/30 18:53]
127.0.0.1 external edit
+++ snowmass2013:montecarlo_d36httbar [2014/04/24 01:51]
@@ Line 1: / Line 1: @@
-[[snowmass2013:montecarlo| <<back]]
-==== Higgs plus ttbar  ====
-Here are samples of [[https://cp3.irmp.ucl.ac.be/projects/delphes | Delphes 3.08]] events generated for the **14 TeV** center-of-mass energy (pp collisions). The events are generated for 0, 50 and 140 pileup scenarios. All data  are stored in the  ROOT format  using the standard [[https://cp3.irmp.ucl.ac.be/projects/delphes | Delphes]] output.
-Therefore, it is recommended to install [[https://cp3.irmp.ucl.ac.be/projects/delphes | Delphes]] and look at the example explaining how to read such ROOT files (see the directory "Examples" inside the Delphes package).
-The samples use the "Snowmass" detector geometry.
-See [[http://www.snowmass2013.org/tiki-index.php?page=Energy_Frontier_FastSimulation| this wiki]] for details.
-==== How to download ====
-Please read the Section [[snowmass2013:download| How to download]]. You need a python script "download.py"
-==== Higgs plus ttbar ====
-The samples are generated for Higgs to ttbar, all decays, using PYTHIA8 (13 TeV collisions).
-In total, there are 96 files per sample (mu=0,50,140), with 1000 ttbar  events in each. Thus the total number of events is  96000 signal events per sample. Processes included:
-<code>
- g g -> H t tbar (SM)
- q qbar -> H t tbar (SM)
-</code>
-For 1000 generated events, the log file:
-<code>
-== Cross section for this run=2.369e-01 pb
-== Events for this run=1000
-== Luminosity for this run=4.222e+00 fb-1
-</code>
-(total lumi is 403 fb-1 for 96000 events)
-Look at PYTHIA8 [[http://atlaswww1.hep.anl.gov/asc/snowmass2013/delphes36/httbar/log/A_RUN_signal.log.gz | log file]] used to generate such files. This is [[http://atlaswww1.hep.anl.gov/asc/snowmass2013/delphes36/httbar/log/analysis.ini | PYTHIA8 settings]].
-=====  No pileup =====
-Get the generated ROOT files from  [[http://atlaswww1.hep.anl.gov/asc/snowmass2013/delphes36/?dir=httbar | this  download link]]. Here is an example for downloading 5 files:
-<code>
-python download.py 5  delphes36/httbar/mu0  pythia8_httbar_delphes306
-</code>
-(set 5 to 96 to download all)
-=====   <mu>=50 =====
-Get the ROOT files from  [[ http://atlaswww1.hep.anl.gov/asc/snowmass2013/delphes36/?dir=httbar/mu50| this  download link]].
-Here is an example for downloading 5 files:
-<code>
-python download.py 5  delphes36/httbar/mu50  pythia8_httbar_delphes306_mu50
-</code>
-(set 5 to 96 to download all)
-===== <mu>=140 =====
-Get the ROOT files from  [[http://atlaswww1.hep.anl.gov/asc/snowmass2013/delphes36/?dir=httbar/mu140 | this  download link]].
-Here is an example for downloading 5 files:
-<code>
-python download.py 5  delphes36/httbar/mu140  pythia8_httbar_delphes306_mu140
-</code>
-(set 5 to 96 to download all)
-==== How to analyze using ROOT ====
-If you need to find the effect of pileup on top reconstruction or a jet measurement, you need to  run the analysis code over signal MC and then over the signal+pileup MC files.
-Read [[snowmass2013:analyse_d3]]
-==== How to analyze without ROOT ====
-In some cases, you may not have ROOT installed to read the Delphes files. In this case, you can use
-ROOT files converted to the ProMC format which can be read without ROOT (using C++, Java, Python). Read
-[[snowmass2013:analyse_d36_promc| how to read Delphes3 output without ROOT]].
- --- //[[[email protected]|Sergei Chekanov]] 2013/03/06 20:48//

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