API for LUXqed methodology in global PDF fits.
The aim of libfiatlux is to provide a blackbox tool which computed the photon PDF at a given Q value
using the LUX approach by Manohar, Nason, Salam and Zanderighi in arXiv:1607.04266 and arXiv:1708.01256. The output of this repository is a C++ library
which can be imported and shared to other programs.
The library implements following features:
- Computes LUX photon by subdividing in elastic, inelastic and msbar components
- Allow variations of parameters to estimate uncertainties
- Generic interface to F2, FL and alpha QED: you can plug APFEL or any other evolution code.
The library is tagged and released when a major and stable status is achieved.
Manual testes are available in the examples folder.
pip install .libfialux depends on the following libraries:
- pkg-config
- yaml-cpp
optinally to build the examples:
- lhapdf
- apfel
please ensure to have the dependencies correctly installed and in your PATH before installing libfiatlux.
Possible configurations:
cmake .
or (recommended):
mkdir build
cd build
cmake ..
You can control the optional flags with ccmake or from cmd line, the most relevant flags are:
CMAKE_INSTALL_PREFIX
ENABLE_EXAMPLESOn the command line, options are controlled appending a -D flag. For
example:
cmake .. -DENABLE_EXAMPLES=on
The code is documented with Doxygen (folder doc/), if you find methods or classes not fully documented open a issue request.
If you decide to use this code please cite the following papers:
- The NNPDF3.1QED paper which is the fundamental motivation for this library arXiv:1712.07053
- The original LUX paper arXiv:1607.04266
- The long/complete version of LUX arXiv:1708.01256
- The GD11-P fit code from: The HERMES Collaboration [A. Airapetian et al.], JHEP 05 (2011) 126.
- The CLAS parametrization used in hep-ph/0301204 (CLAS) and described in hep-ph/9901360.