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--- snowmass2013:montecarlo_d36 [2013/05/30 18:53]
127.0.0.1 external edit
+++ snowmass2013:montecarlo_d36 [2014/04/24 01:51]
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-[[snowmass2013:montecarlo| <<back]]
-==== Low-pT ttbar. Signal and signal+pileup ====
-Here are samples of [[https://cp3.irmp.ucl.ac.be/projects/delphes | Delphes 3.08]] events generated for the **13 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 "Snowmass" detector geometry. Jets were corrected using jet area correction.
-See [[http://www.snowmass2013.org/tiki-index.php?page=Energy_Frontier_FastSimulation| this wiki]] for details.
-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.
-==== How to download ====
-Please read the Section [[snowmass2013:download| How to download]]. You will need the "download.py" script posted on that page.
-=====  Signal ttbar ====
-This is a ttbar (fully inclusive, all decays) without any cut on hard processes. HERWIG++ with sqrt(s)=14 TeV was used.
-The included processes at LO ME are:
-<code>
-g g -> t tbar
-q qbar -> t tbar
-</code>
-Look at the HERWIG++ [[http://atlaswww1.hep.anl.gov/asc/snowmass2013/delphes36/ttbar/log/LHC_signal.log.gz | log file]] used to generate the signal ttbar events. This is [[http://atlaswww1.hep.anl.gov/asc/snowmass2013/delphes36/ttbar/log/LHC_signal.in | input settings]]
-=====  No  pileup =====
-Get the Delphes3 ROOT files from  [[http://atlaswww1.hep.anl.gov/asc/snowmass2013/delphes36/?dir=httbar/mu0 | this  download link]].
-Here is an example for downloading 5 files:
-<code>
-python download.py 5  delphes36/ttbar/mu0  herwigpp_ttbar_delphes306
-</code>
-(set 5 to 96 to download all)
-=====  <mu>=50 =====
-Get the Delphes3 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/ttbar/mu50  herwigpp_ttbar_delphes306_mu50
-</code>
-(set 5 to 96 to download all)
-===== <mu>=140 =====
-Get the Delphes3 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/ttbar/mu140  herwigpp_ttbar_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 these 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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