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dc.contributor.author | CDF Collaboration | - |
dc.contributor.author | Cabrera, Susana | - |
dc.contributor.author | Cuenca Almenar, Cristóbal | - |
dc.contributor.author | Álvarez González, B. | - |
dc.contributor.author | Casal, Bruno | - |
dc.contributor.author | Cuevas, Javier | - |
dc.contributor.author | Gómez, Gervasio | - |
dc.contributor.author | Rodrigo, Teresa | - |
dc.contributor.author | Ruiz Jimeno, Alberto | - |
dc.contributor.author | Scodellaro, Luca | - |
dc.contributor.author | Vila, Iván | - |
dc.contributor.author | Vilar Cortabitarte, R. | - |
dc.contributor.author | Aaltonen, T. | - |
dc.date.accessioned | 2010-03-12T12:09:25Z | - |
dc.date.available | 2010-03-12T12:09:25Z | - |
dc.date.issued | 2009-06-12 | - |
dc.identifier.citation | Physical Review - Section D - Particles and Fields 79 (11): 112007 (2009) | en_US |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/10261/22339 | - |
dc.description.abstract | This paper reports a measurement of the cross section for the pair production of top quarks in p (p) over bar collisions at root s = 1.96 TeV at the Fermilab Tevatron. The data were collected from the CDF run II detector in a set of runs with a total integrated luminosity of 1.1 fb(-1). The cross section is measured in the dilepton channel, the subset of t (t) over bar events in which both top quarks decay through t -> Wb -> l nu b, where l = e, mu, or tau. The lepton pair is reconstructed as one identified electron or muon and one isolated track. The use of an isolated track to identify the second lepton increases the t (t) over bar acceptance, particularly for the case in which one W decays as W -> tau nu. The purity of the sample may be further improved at the cost of a reduction in the number of signal events, by requiring an identified b jet. We present the results of measurements performed with and without the request of an identified b jet. The former is the first published CDF result for which a b-jet requirement is added to the dilepton selection. In the CDF data there are 129 pretag lepton + track candidate events, of which 69 are tagged. With the tagging information, the sample is divided into tagged and untagged subsamples, and a combined cross section is calculated by maximizing a likelihood. The result is sigma(t (t) over bar) = 9.6 +/- 1.2(stat)(-0.5)(+0.6)(sys) +/- 0.6(lum) pb, assuming a branching ratio of BR(W -> l nu) = 10.8% and a top mass of m(t) = 175 GeV/c(2). | en_US |
dc.description.sponsorship | We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A.P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the Korean Science and Engineering Foundation and the Korean Research Foundation; the Science and Technology Facilities Council and the Royal Society, UK; the Institut National de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; and the Academy of Finland. | en_US |
dc.format.extent | 693224 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | en_US |
dc.publisher | American Physical Society | en_US |
dc.rights | openAccess | en_US |
dc.title | Measurement of the t(t)over-bar cross section in p(p)over-bar collisions at root s=1.96 TeV using dilepton events with a lepton plus track selection | en_US |
dc.type | artículo | en_US |
dc.identifier.doi | 10.1103/PhysRevD.79.112007 | - |
dc.description.peerreviewed | Peer reviewed | en_US |
dc.relation.publisherversion | http://dx.doi.org/ 10.1103/PhysRevD.79.112007 | en_US |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.grantfulltext | open | - |
item.openairetype | artículo | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
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