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arXiv · hep-ph/0210252

MC-TESTER: a universal tool for comparisons of Monte Carlo predictions for particle decays in high energy physics

P. Golonka·T. Pierzchala·Z. Was
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Abstract

Theoretical predictions in high energy physics are routinely provided in the form of Monte Carlo generators. Comparisons of predictions from different programs and/or different initialization set-ups are often necessary. MC-TESTER can be used for such tests of decays of intermediate states (particles or resonances) in a semi-automated way. Our test consists of two steps. Different Monte Carlo programs are run; events with decays of a chosen particle are searched, decay trees are analysed and appropriate information is stored. Then, at the analysis step, a list of all found decay modes is defined and branching ratios are calculated for both runs. Histograms of all scalar Lorentz-invariant masses constructed from the decay products are plotted and compared for each decay mode found in both runs. For each plot a measure of the difference of the distributions is calculated and its maximal value over all histograms for each decay channel is printed in a summary table. As an example of MC-TESTER application, we include a test with the tau lepton decay Monte Carlo generators, TAUOLA and PYTHIA. The HEPEVT (or LUJETS) common block is used as exclusive source of information on the generated events.

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P. Golonka, T. Pierzchala, Z. Was. 2004-02-06. MC-TESTER: a universal tool for comparisons of Monte Carlo predictions for particle decays in high energy physics. https://doi.org/10.1016/s0010-4655(03)00466-1

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