Elsevier Science Home
Computer Physics Communications Program Library
Full text online from Science Direct
Programs in Physics & Physical Chemistry
CPC Home

[Licence| Download | New Version Template] admt_v1_0.tar.gz(11 Kbytes)
Manuscript Title: RunDec: a Mathematica package for running and decoupling of the strong coupling and quark masses.
Authors: K.G. Chetyrkin, J.H. Kuhn, M. Steinhauser
Program title: RunDec
Catalogue identifier: ADMT_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 133(2000)43
Programming language: Mathematica 4.0.
Operating system: UNIX.
Keywords: Elementary particle physics, Quantum Chromodynamics, Running coupling constant, Running quark mass, On-shell mass, MSbar mass, Decoupling of heavy particles.
Classification: 11.5.

Nature of problem:
The values for the coupling constant of Quantum Chromodynamics, alphas(nf)(mu), actually depends on the considered energy scale, mu, and the number of active quark flavours, nf. The same applies to light quark masses, mq(nf)(mu), if they are, e.g., evaluated in the MSbar scheme. In the program RunDec all relevant formulae are collected and varioius procedures are provided which allow for a convenient evaluation of alphas(nf)(mu) and mq(nf)(mu) using the state-of-the-art correction terms.

Solution method:
RunDec uses Mathematica functions to perform the different mathematical operations.

Restrictions:
It could be that for an unphysical choice of the input parameters the results are nonsensical.

Running time:
For all operations the running time does not exceed a few seconds.