Inclusive and differential measurements of the tt¯ charge asymmetry in proton–proton collisions at √s = 7 TeV
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Chatrchyan, S.; Brochero Cifuentes, Javier Andrés; Cabrillo Bartolomé, José Ibán; Calderón Tazón, Alicia; Chuang, S. H.; Duarte Campderros, Jorge; Felcini, Marta; Fernández García, Marcos; Gómez Gramuglio, Gervasio; González Sánchez, Francisco Javier; Graziano, Alberto; Jordá Lope, Clara; López Virto, María Amparo; Marco de Lucas, Jesús; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, Francisco; Muñoz Sánchez, Francisca Javiela; Rodrigo Anoro, Teresa; [et al.]Fecha
2012-10Derechos
Attribution-NonCommercial-NoDerivatives 4.0 International. ©2012 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. Open access under CC BY-NC-ND license
Publicado en
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2012, 717(1-3), 129-150
Editorial
Elsevier
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Palabras clave
CMS
Physics
Top quark
Asymmetry
BSM
Resumen/Abstract
The tt charge asymmetry is measured in events containing a charged lepton (electron or muon) and at least four jets, one of which is identified as originating from b-quark hadronization. The analyzed
dataset corresponds to an integrated luminosity of 5.0 fb−1 collected with the CMS detector at the LHC. An inclusive and three differential measurements of the tt charge asymmetry as a function of rapidity, transverse momentum, and invariant mass of the tt system are presented. The measured inclusive t t¯ charge asymmetry is AC = 0.004 ± 0.010 (stat.) ± 0.011 (syst.). This result and the three differential measurements are consistent with zero asymmetry as well as with the predictions of the standard model.
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