Abstract : Evidence is presented for the associated production of a single top quark and W boson in pp collisions at sqrt(s) = 7 TeV with the CMS experiment at the LHC. The analyzed data corresponds to an integrated luminosity of 4.9 inverse femtobarns. The measurement is performed using events with two leptons and a jet originated from a b quark. A multivariate analysis based on kinematic properties is utilized to separate the t t-bar background from the signal. The observed signal has a significance of 4.0 sigma and corresponds to a cross section of (16 +5 -4) pb, in agreement with the standard model expectation of (15.6 +/- 0.4 (+ 1.0 -1.2)) pb.
S. Chatrchyan, M. Besancon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Evidence for associated production of a single top quark and W boson in pp collisions at 7 TeV. Physical Review Letters, American Physical Society, 2013, 110, pp.022003. <10.1103/PhysRevLett.110.022003>. <in2p3-00733239>