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PHOTOS Monte Carlo: a precision tool for QED correctionsin Z and W decays

2005; Springer Science+Business Media; Volume: 45; Issue: 1 Linguagem: Inglês

10.1140/epjc/s2005-02396-4

1434-6052

P. Golonka, Z. Wa̧s,

Medical Imaging Techniques and Applications

We present a discussion of the precision for the PHOTOS Monte Carlo algorithm, with improved implementation of QED interference and multiple-photon radiation. The main application of PHOTOS is the generation of QED radiative corrections in decays of any resonances, simulated by a "host" Monte Carlo generator. By careful comparisons automated with the help of the MC-TESTER tool specially tailored for that purpose, we found that the precision of the current version of PHOTOS is of 0.1% in the case of Z and W decays. In the general case, the precision of PHOTOS was also improved, but this will not be quantified here.