- Version
- 1.1.4
The partonevolution library can be used to evolve parton distributions given by parameterizations at a scale 
to the desired scale 
according to next-to-leading order evolution kernels.
The library is described in : S. Weinzierl, "Fast evolution of parton distributions", http://arXiv.org/abs/hep-ph/0203112
The partonevolution library can be downloaded from http://particlephysics.uni-mainz.de/weinzierl/download/partonevolution-1.1.4.tar.gz
The program uses the Mellin transform method with an optimized contour. Due to this optimized contour the program needs only a few evaluations of the anomalous dimensions and is therefore extremely fast. The library is therefore suited to be used in analysis involving parton distributions with errors, where a functional integration over a set of pdf's is needed. In addition, the program can also be used to simulate x-space evolution programs.
From version 1.1.0 onwards, the library includes an option to include leading-order QED corrections to the evolution of parton distributions. The formalism is described in : M. Roth and S. Weinzierl, "QED corrections to the evolution of parton distributions", http://arXiv.org/abs/hep-ph/0403200 (At the moment, no speed-improved QED kernels are implemented and the evolution with QED corrections is rather slow.)
Documentation of the library is inserted as comment lines inside the source code and can be extracted with the help of the documentation system "doxygen". Doxygen is available from http://www.stack.nl/~dimitri/doxygen
When the library is used for scientific work that leads to publication in a scientific journal, please refer to this program as : S. Weinzierl, "Fast evolution of parton distributions", Comp. Phys. Comm. 148, (2002), 314, (hep-ph/0203112).
