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In this problem we are interested only in the energy loss of the muons, with a high level of accuracy. This can be achieved only when the explicit production of secondaries is activated, but at the same time we do not need either to follow all the particles produced in muon interactions or to simulate e.m. showers. This is the reason why we have switched off the transport of e^±, photons, all charged and neutral hadrons by means of the DISCARD directive (neutrinos are not transported by default) and we have asked for EMF-OFF in the EMF card (the presence of the EMF card is indeed irrelevant when e.m. particles are discarded). This way we minimize the impact in terms of computing time.

Giuseppe Battistoni; INFN, Milano
Francesco Cerutti; CERN, Geneva

Last updated: 10th of December, 2008