A FORTRAN program for numerical solution of the Altarelli-Parisi equations by the Laguerre method

Published: 01-01-1992| Version 1 | DOI: 10.17632/xrttvp6sg6.1
S. Kumano,
J.T. Londergan


Abstract We review the Laguerre method for solving the Altarelli-Parisi equations. The Laguerre method allows one to expand quark/parton distributions and splitting functions in orthonormal polynomials. The desired quark distributions are themselves expanded in terms of evolution operators, and we derive the integrodifferential equations satisfied by the evolution operators. We give relevant equations for both flavor nonsinglet and singlet distributions, for both spin-independent and spin-dependent di... Title of program: LAG1 Catalogue Id: ACGR_v1_0 Nature of problem This program solves the QCD evolution integrodifferential equation (the Altarelli-Parisi equation) satisfied by quark or gluon distribution functions such as are measured in deep inelastic scattering. Versions of this program held in the CPC repository in Mendeley Data ACGR_v1_0; LAG1; 10.1016/0010-4655(92)90176-Y This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)