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Título: | Search for resonant t t ¯ production in proton-proton collisions at √s=13 TeV |
Autor: | Brochero Cifuentes, J. A. CSIC ORCID; Cabrillo, I. J. CSIC ORCID ; Calderon, Alicia ; Chazin Quero, B. CSIC; Duarte Campderros, J. CSIC ORCID ; Fernández-García, Marcos CSIC ORCID ; Fernández Manteca, P. J. CSIC ORCID; García Alonso, A. CSIC ORCID; García-Ferrero, J. CSIC ; Gómez, Gervasio CSIC ORCID ; López Virto, A. CSIC ORCID ; Marco, Jesús CSIC ORCID ; Martínez-Rivero, Celso CSIC ORCID ; Martínez Ruiz del Arbol, P. CSIC ORCID; Matorras, Francisco CSIC ORCID ; Piedra, Jonatan CSIC ORCID ; Prieels, C. CSIC; Rodrigo, Teresa CSIC ORCID ; Ruiz Jimeno, Alberto CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Trevisani, N. CSIC ORCID ; Vila, Iván CSIC ORCID; Vilar Cortabitarte, R. CSIC ORCID | Fecha de publicación: | 3-abr-2019 | Editor: | Springer Nature | Citación: | Journal of High Energy Physics 2019: 31 (2019) | Resumen: | A search for a heavy resonance decaying into a top quark and antiquark (tt¯) pair is performed using proton-proton collisions at s√=13 TeV. The search uses the data set collected with the CMS detector in 2016, which corresponds to an integrated luminosity of 35.9 fb−1. The analysis considers three exclusive final states and uses reconstruction techniques that are optimized for top quarks with high Lorentz boosts, which requires the use of nonisolated leptons and jet substructure techniques. No significant excess of events relative to the expected yield from standard model processes is observed. Upper limits on the production cross section of heavy resonances decaying to a tt¯ pair are calculated. Limits are derived for a leptophobic topcolor Z′ resonance with widths of 1, 10, and 30%, relative to the mass of the resonance, and exclude masses up to 3.80, 5.25, and 6.65 TeV, respectively. Kaluza-Klein excitations of the gluon in the Randall-Sundrum model are excluded up to 4.55 TeV. To date, these are the most stringent limits on tt¯ resonances. | Versión del editor: | http://dx.doi.org/10.1007/JHEP04(2019)031 | URI: | http://hdl.handle.net/10261/213472 | DOI: | 10.1007/JHEP04(2019)031 | Identificadores: | doi: 10.1007/JHEP04(2019)031 e-issn: 1029-8479 issn: 1126-6708 |
Aparece en las colecciones: | (IFCA) Artículos |
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Search_proton.pdf | 1,34 MB | Adobe PDF | Visualizar/Abrir |
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