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Título: | Measurement of the underlying event activity at the LHC with ps = 7 TeV and comparison with ps = 0:9 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 ; Felcini, Marta CSIC ORCID; Fernández-García, Marcos CSIC ORCID ; Gómez, Gervasio CSIC ORCID ; González Sánchez, J. CSIC ; Lobelle Pardo, P. CSIC; López Virto, A. CSIC ORCID ; Marco, Rafael CSIC; Marco, Jesús CSIC ORCID ; Martínez-Rivero, Celso CSIC ORCID ; Martínez-Rivero, Celso CSIC ORCID ; Matorras, Francisco CSIC ORCID ; Muñoz Sánchez, F. J. CSIC ORCID; Piedra, Jonatan CSIC ORCID ; Rodrigo, Teresa CSIC ORCID ; Rodríguez Marrero, Ana Y. CSIC; Ruiz Jimeno, Alberto CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Sobron Sañudo, M. CSIC; Vilar Cortabitarte, R. CSIC ORCID; Vila, Iván CSIC ORCID; CMS Collaboration | Palabras clave: | Hadron-Hadron Scattering | Fecha de publicación: | 2011 | Editor: | Springer Nature | Citación: | Journal of High Energy Physics 9: 109 (2011) | Resumen: | A measurement of the underlying activity in events with a jet of transverse momentum in the several GeV region is performed in proton-proton collisions at at ps = 0:9 and 7 TeV, using data collected by the CMS experiment at the LHC. The production of charged particles with pseudorapidity |η| < 2 and transverse momentum p T > 0.5 GeV/c is studied in the azimuthal region transverse to that of the leading set of charged particles forming a track-jet. A significant growth of the average multiplicity and scalar-p T sum of the particles in the transverse region is observed with increasing p T of the leading track-jet, followed by a much slower rise above a few GeV/c. For track-jet p T larger than a few GeV/c, the activity in the transverse region is approximately doubled with a centre-of-mass energy increase from 0.9 to 7 TeV. Predictions of several QCD-inspired models as implemented in pythia are compared to the data. | Descripción: | 31 páginas, 6 figuras, 1 tabla.-- Open Access: This article is distributed under the terms of the Creative Commons Attribution Noncommercial License | Versión del editor: | http://dx.doi.org/10.1007/JHEP09(2011)109 | URI: | http://hdl.handle.net/10261/52001 | DOI: | 10.1007/JHEP09(2011)109 | E-ISSN: | 1029-8479 |
Aparece en las colecciones: | (IFCA) Artículos |
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Measurement of the underlying.pdf | 605,98 kB | Adobe PDF | Visualizar/Abrir |
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