Abstract
Electroweak production of the top quark is measured in pp collisions at sqrt(s) = 7 TeV, using a dataset collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 36 inverse picobarns. With an event selection optimized for t-channel production, two complementary analyses are performed. The first one exploits the special angular properties of the signal, together with background estimates from data. The second approach uses a multivariate analysis technique to probe the compatibility with signal topology expected from electroweak top quark production. The combined measurement of the cross section is 83.6 +/- 29.8 (stat.+syst.) +/- 3.3 (lumi.) pb, consistent with the standard model expectation.
Highlights
Electroweak production of the top quark is measured for the first time in pp collisions at pffiffi s
TeV, using a data set collected with the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) and corresponding to an integrated luminosity of 36 pbÀ1
The second approach uses a multivariate analysis technique to probe the compatibility with signal topology expected from electroweak top-quark production
Summary
Electroweak production of the top quark is measured for the first time in pp collisions at pffiffi s. The first analysis exploits two angular observables sensitive to t-channel single-top quark production: the noncentral pseudorapidity distribution of the light jet, and the cosine of the angle between this jet and the final-state lepton, in the reconstructed top-quark rest frame.
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