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] acjk_v1_0.gz(39 Kbytes)
Manuscript Title: Z0POLE: a program to calculate the electroweak and QCD radiative corrections to e+e- -> ffbar near the Z0 resonance.
Authors: B.A. Kniehl, R.G. Stuart
Program title: Z0POLE
Catalogue identifier: ACJK_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 72(1992)175
Programming language: Fortran.
Computer: IBM ES9000/900.
Operating system: VM/CMS.
Word size: 32
Keywords: Particle physics, Elementary, E+e- annihilation, Electroweak, Lep, On-shell, (ms)bar, Qcd, Radiative corrections, Renormalization, Z0 resonance.
Classification: 11.5.

Nature of problem:
Comparison between experimental results and theoretical predictions for the process e+e- -> ffbar near the Z0 resonance requires that electro- weak and QCD radiative corrections be taken into account. Possible future upgrades of the LEP collider will require that present calculations be extended to at least include dominant two-loop corrections. For this to be achieved a rigourous one-loop calculation based on a self-consistent perturbation expansion is needed.

Solution method:
A Laurent expansion about the pole of the scattering amplitude is employed to yield a perturbation series that is exactly gauge-invariant order by order and may be extended to include corrections beyond one loop. The calculation of differential cross sections uses closed analytic formulas in both the electroweak and QCD sectors. Calculations are performed in either the on-shell or (MS)bar renormalization schemes.

Restrictions:
Results are expected to be accurate to 0.5 percent for the on-shell renormalization scheme and somewhat better for the (MS)bar scheme. No IR-divergent QED corrections are included. The process e+e- -> e+e- cannot be treated. The program is specifically designed for energies in the Z0 resonance region.

Running time:
1.4 CPU s.