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→Wb→ℓνb 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+0.57−0.53  pb and set a lower limit on the magnitude of the coupling between the top quark and bottom quark |Vtb|>0.78 at the 95% credibility level.

Measurement of the single top quark production cross section and |Vtb | in events with one charged Lepton, large missing transverse energy, and jets at CDF

CAUZ, Diego;PAULETTA, Giovanni;SANTI, Lorenzo Gianni;
2014

Abstract

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→Wb→ℓνb 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+0.57−0.53  pb and set a lower limit on the magnitude of the coupling between the top quark and bottom quark |Vtb|>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/11390/1085124
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