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Manuscript Title: A C++ code to solve the DGLAP equations applied to ultra high energy cosmic rays.
Authors: R. Toldra
Program title: evolve
Catalogue identifier: ADPQ_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 143(2002)287
Programming language: C++.
Computer: Sun, Alpha, Dell-PC.
Operating system: SunOS 5.7, OSF1 4.0, Linux Mandrake 7.2.
Keywords: UHECR, Fragmentation functions, DGLAP equations, Laguerre method, Supersymmetry, Elementary particle physics, Phenomenological model.
Classification: 11.6.

Nature of problem:
In order to predict the spectra of UHECR produced by the decay of a dark matter superheavy particle with mass MX one needs to calculate fragmentation functions at the energy scale MX. These can be calculated from measured low energy fragmentation functions using the DGLAP equations.

Solution method:
The DGLAP equations are solved by expanding them in Laguerre polynomials which reduces their integration to the computation of a set of coefficients. These coefficients are given by algebraic recursive relations.

Gluon coherence at x < 10^-3 is not included.

Running time:
A few seconds.