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We propose a method to estimate the probability of new physics discovery in future high energy physics experiments. Physics simulation gives both the average numbers < N b > of background and < N s > of signal events. We find that the proper definition of the sig-We propose a method for taking into account the systematical errors related to nonexact knowledge of background and signal cross sections. An account of such systematics is very essential in the search for supersymmetry at LHC. We also propose a method for estimation of exclusion limits on new physics in future experiments.

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We study a possibility to detect sleptons at post-WMAP benchmark points at LHC(CMS). We find that at L tot = 30f b −1 it would be possible to detect sleptons at points A, B, C, D, G. We also investigate the production and decays of right and left sleptons separately. We find that at L tot = 30f b −1 it would be possible to detect right sleptons with a mass up to 200 GeV and left ones with a mass up to 300 GeV. 1