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Title
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Search for single top quark production in collisions at =1.96 TeV in the missing transverse energy plus jets topology
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| We report a search for single top quark production with the CDF II detector using 2.1 fb-1 of integrated luminosity of pp̅ collisions at √s=1.96 TeV. The data selected consist of events characterized by large energy imbalance in the transverse plane and hadronic jets, and no identified electrons and muons, so the sample is enriched in W→τν decays. In order to suppress backgrounds, additional kinematic and topological requirements are imposed through a neural network, and at least one of the jets must be identified as a b quark jet. We measure an excess of signal-like events in agreement with the standard model prediction, but inconsistent with a model without single top quark production by 2.1 standard deviations (σ), with a median expected sensitivity of 1.4σ. Assuming a top quark mass of 175 GeV/c2 and ascribing the excess to single top quark production, the cross section is measured to be 4.9-2.2+2.5(stat+syst) pb, consistent with measurements performed in independent data sets and with the standard model prediction. |
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Language
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English
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Source (journal)
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Physical review : D : particles, fields, gravitation, and cosmology / American Physical Society. - Ridge, N.Y., 2004 - 2015
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
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Publication
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Ridge, N.Y.
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American Physical Society
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2010
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ISSN
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1550-7998
[print]
1550-2368
[online]
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DOI
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10.1103/PHYSREVD.81.072003
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Volume/pages
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81
:7
(2010)
, p. 072003,1-072003,24
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Article Reference
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072003
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ISI
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000277201900007
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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