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Title

Search for single top quark production in pp collisions at √s=1.96  TeV in the missing transverse energy plus jets topology

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review. D. 2010, vol. 81, no. 07, p. 072003
Abstract We report a search for single top quark production with the CDF II detector using 2.1  fb−1 of integrated luminosity of pp 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+2.5−2.2(stat+syst)  pb, consistent with measurements performed in independent data sets and with the standard model prediction.
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CDF COLLABORATION. Search for single top quark production in pp collisions at √s=1.96  TeV in the missing transverse energy plus jets topology. In: Physical Review. D, 2010, vol. 81, n° 07, p. 072003. https://archive-ouverte.unige.ch/unige:38658

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Deposited on : 2014-07-14

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