Data format (DST) for a Monte Carlo event generator output using ROOT package. The McDst set of classes (that can be compiled to the library) allows to store and work with filename.mcDst.root files or with a list (filename.lis or filename.list) of such files.
Brief description of how to compile and run the analysis over mcDst on your machine.
a) System has to have ROOT preinstalled (should work with versions 5 and 6).
b) There is a Makefile stored in the mcdst directory. In order to compile the codes one needs to run:
make
c) Since it is the most commonly used, the g++ compiler is used for the compilation. However, one can also switch it to clang++ (has been successfully tested)
d) After the compilation is finished the shared library libMcDst.so will be created.
e) If you have some errors during the compilation please contact the McDst maintainer.
There are three ROOT macroses with example of how to perform a simple analysis using McDst. They are stored in the mcdst/macros directory and called: analyseMcDst.C, runProcessing.C, and analyseWithBranches.C.
Lets assume that one has and input file(s) InputFile with a name.mcDst.root or a list of mcDst files, called name.lis(t), and McDst is compiled (i.e. the libMcDst.so library exists).
There are 2 possible processing scenarios of using McDst library and classes depending on the ROOT version:
One should run ROOT from the terminal:
[myterm]> root runProcessing.C\(\"InputFile\",\"oFileName\"\)
Aforementioned will load libMcDst.so, compile and run runProcessing.C. After the processing will be finished, it will remove dictionary and library created by ACLiC.
Since ROOT 6 does not have CINT there is some extra flexibility on how to analyze the data. The first one is listed above. The second option is to run the analyseMcDst.C macro directly.
Either from the terminal:
root runProcessing.C\(\"InputFile\",\"oFileName\"\)
Or from the root session:
[myterm]> root
root [0].x runProcessing.C("InputFile","oFileName")
The other possibility is not to use McDst classes, but read filename.mcDst.root files as regular ROOT TTree. The macros analyseWithBranches.C shows an example of doing it.
There are various MC generators used in the field. To convert their output one can convert it to the McDst format via special tiny C++ programs (e.g., urqmd2mc.cpp). To do it, one needs to compile an executable file:
make converters
To run the converter, the MCDST environment variable should be added to PATH and LD_LIBRARY_PATH. One can do it either by calling a shell script (mcdst_environment.bash) which will define the variable for the current session:
source mcdst_environment.sh
or by hands to the environment.
After the environment variable is added one can run the converter.
For any questions or with any suggestions please contact the package maintainer.