Measurement of the tt¯ production cross section in the τ+jets channel in pp collisions at √s = 7 TeV

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URI: http://hdl.handle.net/10902/25606
ISSN: 1434-6044
ISSN: 1434-6052
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Autoría
Chatrchyan, Serguei; Brochero Cifuentes, Javier AndrésAutoridad Unican; Cabrillo Bartolomé, José IbanAutoridad Unican; Calderón Tazón, AliciaAutoridad Unican; Chuang, S. H.; Duarte Campderros, JorgeAutoridad Unican; Felcini, Marta; Fernández García, MarcosAutoridad Unican; Gómez Gramuglio, GervasioAutoridad Unican; González Sánchez, Francisco JavierAutoridad Unican; Graziano, Alberto; Jordá Lope, Clara; López Virto, María Amparo; Marco de Lucas, JesúsAutoridad Unican; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, FranciscoAutoridad Unican; Muñoz Sánchez, Francisca Javiela; Rodrigo Anoro, TeresaAutoridad Unican; [et al.]
Fecha
2013-04
Derechos
Attribution 4.0 International©CERN for the benefit of the CMS collaboration 2013.
Publicado en
European Physical Journal C, 2013, 73(4), 2386, 1-18
Editorial
Springer New York LLC
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Resumen/Abstract
The top-quark pair production cross section in 7 TeV center-of-mass energy proton-proton collisions is measured using data collected by the CMS detector at the LHC. The measurement uses events with one jet identified as a hadronically decaying ? lepton and at least four additional energetic jets, at least one of which is identified as coming from a b quark. The analyzed data sample corresponds to an integrated luminosity of 3.9 fb-1 recorded by a dedicated multijet plus hadronically decaying ? trigger. A neural network has been developed to separate the top-quark pairs from the W+jets and multijet backgrounds. The measured value of ?tt?= 152 ± 12,(stat.) ± 32,(syst.) ±,(lum.) pb is consistent with the standard model predictions.
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Attribution 4.0 International©CERN for the benefit of the CMS collaboration 2013.Excepto si se señala otra cosa, la licencia del ítem se describe como Attribution 4.0 International©CERN for the benefit of the CMS collaboration 2013.