Artículos de revistas
Measurement of jet pT correlations in Pb+Pb and pp collisions at √sNN = 2.76 TeV with the ATLAS detector
Fecha
2017-07Registro en:
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
0370-2693
CONICET Digital
CONICET
Autor
Aaboud, M.
Aad, G.
Abbott, B.
Abdallah, B.
Abdinov, O.
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, Maria Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernan Pablo
Otero y Garzon, Gustavo Javier
Piegaia, Ricardo Nestor
Bossio Sola, Jonathan David
Daneri, María Florencia
Devesa, Maria Roberta
Marceca, Gino
Sacerdoti, Sabrina
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
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.