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Manuscript Title: APFEL: A PDF Evolution Library with QED corrections
Authors: Valerio Bertone, Stefano Carrazza, Juan Rojo
Program title: APFEL
Catalogue identifier: AESQ_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 185(2014)1647
Programming language: Fortran 77, C/C++ and Python.
Computer: All.
Operating system: All.
RAM: ≤ 2MB
Keywords: Unpolarised parton distribution functions (PDFs), DGLAP evolution equations, QED corrections, Electroweak effects, Deep-inelastic scattering (DIS).
Classification: 11.6.

External routines: LHAPDF

Nature of problem:
Solution of the unpolarized coupled DGLAP evolution equations up to NNLO in QCD and to LO in QED in the variable-flavor-number scheme, both with pole and with MSbar masses.

Solution method:
Representation of parton distributions and splitting functions on a grid in x, discretization of DGLAP evolution equations and higher-order interpolation for general values of x, numerical solution of the resulting discretized evolution equations using Runge-Kutta methods.

Smoothness of the initial conditions for the PDF evolution.

Running time:
A few seconds for initialisation, then ~0.5 s for the generation of the PDF tables with combined QCD⊗QED evolution (on a Intel(R) Core(TM)2 Duo CPU E6750 @ 2.66GHz).