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| Título: | Determination of the top-quark pole mass and strong coupling constant from the tt̄ production cross section in pp collisions at √s = 7 TeV |
Autor: | Chatrchyan, S.; Brochero Cifuentes, J. A. CSIC ORCID; Cabrillo, I. J. CSIC ORCID ; Calderon, Alicia ; Chuang, S. H. CSIC; Duarte Campderros, J. CSIC ORCID ; Fernández-García, Marcos CSIC ORCID ; Gómez, Gervasio CSIC ORCID ; González Sánchez, J. CSIC ; Graziano, A. CSIC; Jorda, C. CSIC; López Virto, A. CSIC ORCID ; Marco, Jesús CSIC ORCID ; Marco, Rafael CSIC; Martínez-Rivero, Celso CSIC ORCID ; Matorras, Francisco CSIC ORCID ; Muñoz Sánchez, F. J. CSIC ORCID; Rodrigo, Teresa CSIC ORCID ; Rodríguez Marrero, Ana Y. CSIC; Ruiz Jimeno, Alberto CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Vila, Iván CSIC ORCID; Vilar Cortabitarte, R. CSIC ORCID; CMS Collaboration | Fecha de publicación: | 2014 | Editor: | Elsevier | Citación: | Physics Letters B 728: 496-517 (2014) | Resumen: | The inclusive cross section for top-quark pair production measured by the CMS experiment in proton-proton collisions at a center-of-mass energy of 7 TeV is compared to the QCD prediction at next-to-next-to-leading order with various parton distribution functions to determine the top-quark pole mass, mt pole, or the strong coupling constant, αS. With the parton distribution function set NNPDF2.3, a pole mass of 176. 7+3.8 -3.4 GeV is obtained when constraining αS at the scale of the Z boson mass, mZ, to the current world average. Alternatively, by constraining mt pole to the latest average from direct mass measurements, a value of αS(mZ) = 0. 1151+0.0033 -0.0032 is extracted. This is the first determination of αS using events from top-quark production. © 2013 The Authors. Published by Elsevier B.V. | Descripción: | Open Access Under a Creative Commons license.-- et al. | Versión del editor: | http://dx.doi.org/10.1016/j.physletb.2013.12.009 | URI: | http://hdl.handle.net/10261/110501 | DOI: | 10.1016/j.physletb.2013.12.009 | Identificadores: | doi: 10.1016/j.physletb.2013.12.009 issn: 0370-2693 |
| Aparece en las colecciones: | (IFCA) Artículos |
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| Determination of the top-quark pole mass.pdf | 730,17 kB | Adobe PDF |  Visualizar/Abrir |
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