PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays
نویسنده
چکیده
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. To be submitted to EPJC IFJPAN-V-05-01 CERN-PH-TH/2005-091 Supported in part by the EU grant MTKD-CT-2004-510126, in partnership with the CERN Physics Department, and the Polish State Committee for Scientific Research (KBN) grant 2 P03B 091 27 for years 2004-2006.
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