First measurement of the cross section for top-quark pair production in proton-proton collisions at vs=7 TeV

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URI: https://hdl.handle.net/10902/28398
ISSN: 0370-2693
ISSN: 1873-2445
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Autoría
Khachatryan, V.; Cabrillo Bartolomé, José IbanAutoridad Unican; Calderón Tazón, AliciaAutoridad Unican; Chamizo Llatas, María; Chuang, S. H.; Duarte Campderros, JorgeAutoridad Unican; Felcini, Marta; Fernández García, MarcosAutoridad Unican; Gómez Gramuglio, GervasioAutoridad Unican; González Sánchez, Francisco JavierAutoridad Unican; González Suárez, Rebeca; Jordá Lope, Clara; Lobelle Pardo, Patricia; López Virto, María Amparo; Marco de Lucas, JesúsAutoridad Unican; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, FranciscoAutoridad Unican; Piedra Gómez, JonatanAutoridad Unican; [et al.]
Fecha
2011-01
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Attribution-NonCommercial-NoDerivatives 4.0 International. ©2010 CERN, for the benefit of the CMS Collaboration. Published by Elsevier B.V. All rights reserved.
Publicado en
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2011, 695(5), 424-443
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Elsevier
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Palabras clave
CMS
LHC
Physics
Top quark
Cross section
Resumen/Abstract
The first measurement of the cross section for top-quark pair production in pp collisions at the Large Hadron Collider at center-of-mass energy ?s = 7 TeV has been performed using a data sample corresponding to an integrated luminosity of 3.1 ± 0.3 pb?1 recorded by the CMS detector. This result utilizes the final state with two isolated, highly energetic charged leptons, large missing transverse energy, and two or more jets. Backgrounds from Drell?Yan and non-W/Z boson production are estimated from data. Eleven events are observed in the data with 2.1 ± 1.0 events expected from background. The measured cross section is 194 ± 72(stat.) ± 24(syst.) ± 21(lumi.) pb, consistent with next-to-leading order predictions
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Attribution-NonCommercial-NoDerivatives 4.0 International. ©2010 CERN, for the benefit of the CMS Collaboration. Published by Elsevier B.V. All rights reserved.Excepto si se señala otra cosa, la licencia del ítem se describe como Attribution-NonCommercial-NoDerivatives 4.0 International. ©2010 CERN, for the benefit of the CMS Collaboration. Published by Elsevier B.V. All rights reserved.