Abstract
Results of the search for single top-quark production in the s-channel in p-p collisions at a centerof-mass energy of 8 TeV by the CMS experiment at the LHC is presented. Leptonic decays mode of top quarks with an electron or muon in the final state are considered. In order to separate the expected signal from background processes, a multivariate discriminant is defined using Boosted Decision Trees (BDT). For signal extraction a maximum-likelihood fit performed on the distribution of BDT discriminant. This analysis leads to an upper limit on the cross section of 11.5 Pb, corresponding to 2.1 times the standard model cross section, at 95% Confidence Level.
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