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Abstract: We report a measurement of single top quark production in proton-antiproton collisions at a center-of-mass energy of vs=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?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+0.57-0.53??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.
Fuente: Phys. Rev. Lett. Vol. 113, Num. 26, Pag. 261804 (2014)
Publisher: American Physical Society
Publication date: 01/12/2014
No. of pages: 8
Publication type: Article
DOI: 10.1103/PhysRevLett.113.261804
ISSN: 0031-9007,1079-7114
Spanish project: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01
Publication Url: https://doi.org/10.1103/PhysRevLett.113.261804
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AALTONEN, TIMO ANTERO
BRUNO CASAL LARAÑA
FRANCISCO JAVIER CUEVAS MAESTRO
GERVASIO GOMEZ GRAMUGLIO
JOSE ENRIQUE PALENCIA CORTEZON
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
ROCIO VILAR CORTABITARTE
JESUS MANUEL VIZAN GARCIA
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