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Abstract:

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.

Registro:

Documento: Artículo
Título:Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2891 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2891 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2014
Volumen:90
Número:4
DOI: http://dx.doi.org/10.1103/PhysRevC.90.044906
Título revista:Physical Review C - Nuclear Physics
Título revista abreviado:Phys. Rev. C Nucl. Phys.
ISSN:05562813
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v90_n4_p_Aad

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Citas:

---------- APA ----------
(2014) . Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector. Physical Review C - Nuclear Physics, 90(4).
http://dx.doi.org/10.1103/PhysRevC.90.044906
---------- CHICAGO ----------
Aad, G. "Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector" . Physical Review C - Nuclear Physics 90, no. 4 (2014).
http://dx.doi.org/10.1103/PhysRevC.90.044906
---------- MLA ----------
Aad, G. "Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector" . Physical Review C - Nuclear Physics, vol. 90, no. 4, 2014.
http://dx.doi.org/10.1103/PhysRevC.90.044906
---------- VANCOUVER ----------
Aad, G. Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s NN =5.02 TeV proton-lead collisions with the ATLAS detector. Phys. Rev. C Nucl. Phys. 2014;90(4).
http://dx.doi.org/10.1103/PhysRevC.90.044906