APFEL: A PDF Evolution Library

Visit: http://apfel.hepforge.org and http://apfel.mi.infn.it/

APFEL is able to perform DGLAP evolution up to NNLO in QCD and to LO in QED, both with pole and MSbar masses. The coupled DGLAP QCD+QED evolution equations are solved in x-space by means of higher order interpolations and Runge-Kutta techniques, allowing to explore different options for the treatment of subleading terms.

The APFEL library implements the following tools:

• APFEL Web: APFEL provides an online web-app which integrates several HEP softwares providing a complete suite for PDF analysis (http://apfel.mi.infn.it/).

• APFEL GUI: APFEL provides the user with a graphical interface which performs PDF, luminosity and DIS observables plots in real time, granting an easy access to all the APFEL's functionalities.

Download

You can obtain APFEL directly from the github repository:

https://github.com/scarrazza/apfel/releases

For the last development version you can clone the master code:

git clone https://github.com/scarrazza/apfel.git

For the latest tag:

git tag -l
git checkout tags/tag_name

Installation

Checkout the code and compile the code using the following procedure:

cd apfel
./configure --prefix=/where/install/apfel #(optional)
make && make install

By the default, if prefix is not set the program is installed in /usr/local. If you define a custom prefix, remember to export apfel/lib to the LD_LIBRARY_PATH. APFEL GUI requires ROOT (> 5), qmake (> 4.5) and APFEL (> 1.0.1). The installation steps are:

cd apfel/apfelGUI
qmake
make && make install
apfelgui

If you observe problems when running the GUI please set your LC_ALL=C.

References

• V. Bertone, S. Carrazza, J. Rojo, Doped Parton Distributions, arXiv:1509.04022.
• V. Bertone, S. Carrazza, D. Pagani, M. Zaro, On the Impact of Lepton PDFs, arXiv:1508.07002.
• V. Bertone, S. Carrazza, E. Nocera, Reference results for time-like evolution up to O(α_s^3), arXiv:1501.00494.
• S. Carrazza, A. Ferrara, D. Palazzo, J. Rojo, APFEL Web: a web-based application for the graphical visualization of parton distribution functions, arXiv:1410.5456.
• V. Bertone, S. Carrazza, J. Rojo, APFEL: A PDF Evolution Library with QED corrections, arXiv:1310.1394.

Contact Information

Maintainers: Valerio Bertone, Stefano Carrazza

Homepage: http://apfel.hepforge.org/