Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector

Measurements of two-particle correlation functions and the first five azimuthal harmonics, v 1 to v 5 , are presented, using 28 nb -1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV measured with the ATLAS detector at the LHC. Significant long-range "ridgelike&quo...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Aad, G.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_05562813_v90_n4_p_Aad
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_05562813_v90_n4_p_Aad
record_format dspace
spelling todo:paper_05562813_v90_n4_p_Aad2023-10-03T15:35:08Z Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector Aad, G. Measurements of two-particle correlation functions and the first five azimuthal harmonics, v 1 to v 5 , are presented, using 28 nb -1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV measured with the ATLAS detector at the LHC. Significant long-range "ridgelike" correlations are observed for pairs with small (|Δϕ|<π/3) and back-to-back pairs (|Δφ|>2π/3) over the transverse momentum range 0.4<p T <12 GeV and in different intervals of event activity. The event activity is defined by either the number of reconstructed tracks or the total transverse energy on the Pb-fragmentation side. The azimuthal structure of such long-range correlations is Fourier decomposed to obtain the harmonics ν n as a function of pT and event activity. The extracted ν n values for n=2 to 5 decrease with n. The ν 2 and ν 3 values are found to be positive in the measured pT range. The ν 1 is also measured as a function of pT and is observed to change sign around pT≈1.5-2.0 GeV and then increase to about 0.1 for pT>4 GeV. The ν 2 (pT), ν 3 (pT), and ν 4 (pT) are compared to the ν n coefficients in Pb+Pb collisions at √sNN=2.76 TeV with similar event multiplicities. Reasonable agreement is observed after accounting for the difference in the average pT of particles produced in the two collision systems. © 2014 CERN, for the ATLAS Collaboration. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_05562813_v90_n4_p_Aad
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Measurements of two-particle correlation functions and the first five azimuthal harmonics, v 1 to v 5 , are presented, using 28 nb -1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV measured with the ATLAS detector at the LHC. Significant long-range "ridgelike" correlations are observed for pairs with small (|Δϕ|<π/3) and back-to-back pairs (|Δφ|>2π/3) over the transverse momentum range 0.4<p T <12 GeV and in different intervals of event activity. The event activity is defined by either the number of reconstructed tracks or the total transverse energy on the Pb-fragmentation side. The azimuthal structure of such long-range correlations is Fourier decomposed to obtain the harmonics ν n as a function of pT and event activity. The extracted ν n values for n=2 to 5 decrease with n. The ν 2 and ν 3 values are found to be positive in the measured pT range. The ν 1 is also measured as a function of pT and is observed to change sign around pT≈1.5-2.0 GeV and then increase to about 0.1 for pT>4 GeV. The ν 2 (pT), ν 3 (pT), and ν 4 (pT) are compared to the ν n coefficients in Pb+Pb collisions at √sNN=2.76 TeV with similar event multiplicities. Reasonable agreement is observed after accounting for the difference in the average pT of particles produced in the two collision systems. © 2014 CERN, for the ATLAS Collaboration.
format JOUR
author Aad, G.
spellingShingle Aad, G.
Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector
author_facet Aad, G.
author_sort Aad, G.
title Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector
title_short Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector
title_full Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector
title_fullStr Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector
title_full_unstemmed Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector
title_sort measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s nn =5.02 tev proton-lead collisions with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_05562813_v90_n4_p_Aad
work_keys_str_mv AT aadg measurementoflongrangepseudorapiditycorrelationsandazimuthalharmonicsinsnn502tevprotonleadcollisionswiththeatlasdetector
_version_ 1807318121726345216

Ejemplares similares