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AliRoot External Generators

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Install pythia8

 

 

Note from v4-20-Release onward pythia8140 is part of the AliRoot distribution.

You only need to set the environment variables

export PYTHIA8=$ALICE_ROOT/PYTHIA8
export PYTHIA8DATA=$PYTHIA8/xmldoc
export LHAPATH=$ALICE_ROOT/LHAPDF/PDFsets

 

  • Download pythia8130.tgz from the pythia web-site
  • Unpack:
    tar -xvzf pythia8130.tgz
  • Configure by running inside pythia8130:
    ./configure --enable-debug --enable-shared
  • Compile by running inside pythia8130:
    ./make

Set-up your environment in your shell specifc set-up script

export PYTHIA8=YourPathToPythia
export PYTHIA8DATA=$PYTHIA8/xmldoc
export LHAPATH=$ALICE_ROOT/LHAPDF/PDFsets
export LD_LIBRARY_PATH=$PYTHIA8/lib\:$LD_LIBRARY_PATH

NB: depending on your SHELL replace export by setenv

Install ROOT with pythia8 support

  • Install root version > 5.19/02 [This is a version that you need for the trunk of AliRoot]
  • Update the directory pythia8 to the trunk
  • Configure with the options:
     --enable-pythia8 \
     --with-pythia8-incdir=$PYTHIA/include \
     --with-pythia8-libdir=$PYTHIA/lib
  • Compile

Recompile $ALICE_ROOT/PYTHIA8 directory

cd  $ALICE_ROOT
make

Run and have fun

There is an example $ALICE_ROOT/PYTHIA8/pythia8.C. See whether it runs and modify it ad gusto.

 

Using DPMJet with AliRoot

 DPMJET 3.0-5 which contains PHOJET 1.12-35c3 is provided with the trunk of AliRoot. The TGenerator interface implementation TDPMjet and AliGenerator implementation AliGenDPMjet are contained in the directory $ALICE_ROOT/TDPMjet.

In the same directory you find the macro fastGenDPMjet.C that contains an example configuration.

You have to copy the file $ALICE_ROOT/DPMJET/dpmjet.dat into your working directory.