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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_0Distribution 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 | ||

Peripherals: disc. | ||

Keywords: Elementary, Particle physics, Heavy quark effects, Monte carlo generation, Quantum chromodynamics, Function structure Evolution, Leading logarithm Approximation. | ||

Classification: 11.5. | ||

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. | ||

Solution method:Monte Carlo generation of QCD emission of quanta. | ||

Unusual features:Use of the CERN program library, and specifically of the minimization program MINUITS. | ||

Running time: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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