We report a measurement of single top quark production in proton-antiproton collisions at a center-of-mass energy of root 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 -> Wb -> l nu 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 3.04(-0.53)(+0.57) pb and set a lower limit on the magnitude of the coupling between the top quark and bottom quark vertical bar V-tb vertical bar > 0.78 at the 95% credibility level.

Measurement of the Single Top Quark Production Cross Section and vertical bar V-tb vertical bar in Events with One Charged Lepton, Large Missing Transverse Energy, and Jets at CDF

MARINO, PIETRO;MORELLO, MICHAEL JOSEPH;
2014

Abstract

We report a measurement of single top quark production in proton-antiproton collisions at a center-of-mass energy of root 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 -> Wb -> l nu 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 3.04(-0.53)(+0.57) pb and set a lower limit on the magnitude of the coupling between the top quark and bottom quark vertical bar V-tb vertical bar > 0.78 at the 95% credibility level.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/59651
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