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All sourcesNASA NTRSDOE OSTI
DOE OSTI2014

Measurement of the Single Top Quark Production Cross Section and |𝑉𝑡⁢𝑏| in Events with One Charged Lepton, Large Missing Transverse Energy, and Jets at CDF

We report a measurement of single top quark production in proton-antiproton collisions at a center-of-mass energy of √𝑠 = 1.96 TeV using a data set corresponding to 7.5 fb −1 of integrated luminosity collected by the Collider Detector at Fermilab. We select events consistent with the single top quark decay process 𝑡 →𝑊⁢𝑏 →ℓ⁢𝜈⁢𝑏 by requiring the presence of an electron or muon, a large imbalance of transverse momentum indicating the presence of a neutrino, and two or three jets including at least one originating from a bottom quark. An artificial neural network is used to discriminate the signal from backgrounds. We measure a single top quark production cross section of $3.0⁢4^{+0.57}_{−0.53}$ pb and set a lower limit on the magnitude of the coupling between the top quark and bottom quark |𝑉𝑡⁢𝑏|>0.78 at the 95% credibility level.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗