Programs in Physics & Physical Chemistry
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|Manuscript Title: UNIBAB, version 2.0: Monte Carlo event generation for large angle Bhabha scattering at LEP.|
|Authors: H. Anlauf, P. Manakos, T. Mannel, T. Ohl, H. Meinhard, H.-D. Dahmen|
|Program title: UNIBAB, Version 2.0|
|Catalogue identifier: ACTC_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 79(1994)466|
|Programming language: Fortran.|
|Computer: IBM 3090.|
|Operating system: MVS, AIX, IRIX, Ultrix.|
|RAM: 65K words|
|Word size: 32|
|Keywords: Particle physics, Elementary, Event simulation, Radiative corrections, Bhabha scattering, Multiphoton radiation.|
Nature of problem:
Higher order leading logarithmic QED radiative corrections to large angle Bhabha scattering (e+e- -> e+e-gamma...) at Zo-energies including weak corrections.
Monte Carlo event generation.
The program assumes dominance of the s-channel Zo-exchange contributions and does not include the interference between initial and final state radiation. Therefore, the program should only be used in the vicinity of the Zo-peak and only for not too small and not too large scattering angles (10 degrees < theta* < 170 degrees). For cross checks, the contributions of the t-channel diagrams may be switched off, so that the program effectively simulates e+e- -> mu+mu-. However, the latter mode is not very efficient.
Strongly dependent on the energy and the chosen cuts. The test run took approximately 190 CPU seconds on an IBM 3090 under MVS, 380 CPU seconds on an IBM RS/6000-520 running AIX, 220 CPU seconds on an SGI 460 running IRIX, and 340 CPU seconds on a DECstation 5000/240 running Ultrix.
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