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Artículo

Measurement of jet pT correlations in Pb+Pb and pp collisions at √sNN = 2.76 TeV with the ATLAS detector

Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, B.; Abdinov, O.; Alconada Verzini, María JosefinaIcon ; Alonso, FranciscoIcon ; Arduh, Francisco AnuarIcon ; Dova, Maria TeresaIcon ; Monticelli, Fernando GabrielIcon ; Wahlberg, Hernan PabloIcon ; Otero y Garzon, Gustavo JavierIcon ; Piegaia, Ricardo NestorIcon ; Bossio Sola, Jonathan DavidIcon ; Daneri, María FlorenciaIcon ; Devesa, Maria RobertaIcon ; Marceca, GinoIcon ; Sacerdoti, SabrinaIcon ; Zimine, N. I.; Zimmermann, C.; Zimmermann, S.; Zinonos, Z.; Zinser, M.; Ziolkowski, M.; Živković, L.; Zobernig, G.; Zoccoli, A.; Zou, R.; Nedden, M. zur; Zwalinski, L.; The ATLAS Collaboration
Fecha de publicación: 07/2017
Editorial: Elsevier Science
Revista: Physics Letters B
ISSN: 0370-2693
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

Measurements of dijet pT correlations in Pb+Pb and pp collisions at a nucleon–nucleon centre-of-mass energy of √ sNN = 2.76 TeV are presented. The measurements are performed with the ATLAS detector at the Large Hadron Collider using Pb+Pb and pp data samples corresponding to integrated luminosities of 0.14 nb−1 and 4.0 pb−1 , respectively. Jets are reconstructed using the anti-kt algorithm with radius parameter values R = 0.3 and R = 0.4. A background subtraction procedure is applied to correct the jets for the large underlying event present in Pb+Pb collisions. The leading and sub-leading jet transverse momenta are denoted pT1 and pT2 . An unfolding procedure is applied to the two-dimensional (pT1 , pT2 ) distributions to account for experimental effects in the measurement of both jets. Distributions of (1/N)dN/dxJ , where xJ = pT2 /pT1 , are presented as a function of pT1 and collision centrality. The distributions are found to be similar in peripheral Pb+Pb collisions and pp collisions, but highly modified in central Pb+Pb collisions. Similar features are present in both the R = 0.3 and R = 0.4 results, indicating that the effects of the underlying event are properly accounted for in the measurement. The results are qualitatively consistent with expectations from partonic energy loss models.
Palabras clave: Atlas , Cern , Hep , Lhc
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/60371
DOI: http://dx.doi.org/10.1016/j.physletb.2017.09.078
URL: http://inspirehep.net/record/1607896
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Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Citación
Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, B.; Abdinov, O.; et al.; Measurement of jet pT correlations in Pb+Pb and pp collisions at √sNN = 2.76 TeV with the ATLAS detector; Elsevier Science; Physics Letters B; B 774; 7-2017; 379-402
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