Programs in Physics & Physical Chemistry
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|Manuscript Title: HEVOL: a Monte Carlo program to calculate the evolution of structure functions with the inclusion of heavy quark effects.|
|Authors: R. Odorico|
|Program title: HEVOL|
|Catalogue identifier: AAVH_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 25(1982)253|
|Programming language: Fortran.|
|Computer: CDC 7600.|
|Operating system: SCOPE 2.1.5, NOS/BE.|
|RAM: 22K words|
|Word size: 60|
|Keywords: Elementary, Particle physics, Heavy quark effects, Monte carlo generation, Quantum chromodynamics, Function structure Evolution, Leading logarithm Approximation.|
Nature of problem:
Calculation of QCD evolution of structure functions including the effects of heavy quark production, with the immediate aim of determining relevant QCD parameters by least-square fits to experimental data.
Monte Carlo generation of QCD emission of quanta.
Use of the CERN program library, and specifically of the minimization program MINUITS.
In the test program set-up (singlet analysis of muon deep inelastic scattering data, 94 data points with Q**2 ranging from 2.8 to 200 GeV**2, minimum Bjorken's x 0.04, Lambda <= 0.5 GeV, and charmed sea contribution calculated separately) 137 s of CDC 7600 time to process 4 X 50000 Cascades for the calculation of kernels (which can be saved on disk for after use with the same data, or subset of them), and 0.03 s per call of the minimization program MINUIT (for convolutions done with 100x-bins). If non-singlet quantities only are needed the kernal calculation time reduces to about 15 s and the time per MINUIT call to 0.02 s, under the same conditions and minimum x 0.25.
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