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Measurement of flow harmonics correlations with mean transverse momentum in lead-lead and proton-lead collisions at √sNN=5.02 TeV with the ATLAS detector

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To assess the properties of the quark-gluon plasma formed in ultrarelativistic ion collisions, the ATLAS experiment at the LHC measures a correlation between the mean transverse momentum and the flow harmonics. The analysis uses data samples of lead-lead and proton-lead collisions obtained at the ce...

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Main Authors: Aad, Georges (Author) , Anders, Christoph (Author) , Andrei, George Victor (Author) , Antel, Claire (Author) , Bolz, Arthur (Author) , Dunford, Monica (Author) , Ferreira de Lima, Danilo Enoque (Author) , Franchino, Silvia (Author) , Geisler, Manuel Patrice (Author) , Helary, Louis (Author) , Jongmanns, Jan (Author) , Klassen, Martin (Author) , Kolb, Mathis (Author) , Krishnan, Anjali (Author) , Kugel, Andreas (Author) , Lisovyi, Mykhailo (Author) , Meyer zu Theenhausen, Hanno (Author) , Napolitano, Fabrizio (Author) , Ott, Philipp (Author) , S̜ahinsoy, Merve (Author) , Schöning, André (Author) , Schultz-Coulon, Hans-Christian (Author) , Spieker, Thomas (Author) , Stamen, Rainer (Author) , Starovoitov, Pavel (Author) , Suchek, Stanislav (Author) , Vigani, Luigi (Author) , Wang, Jike (Author) , Weber, Sebastian (Author) , Wessels, Martin (Author) , Yue, Xiaoguang (Author)
Corporate Author: ATLAS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 03 December 2019
In: The European physical journal. C, Particles and fields
Year: 2019, Volume: 79, Issue: 12
ISSN:1434-6052
DOI:10.1140/epjc/s10052-019-7489-6
Online Access:Verlag, Volltext: https://doi.org/10.1140/epjc/s10052-019-7489-6
Verlag, Volltext: https://link.springer.com/article/10.1140/epjc/s10052-019-7489-6
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Author Notes:ATLAS Collaboration. G. Aad [und weitere]
Description
Summary:To assess the properties of the quark-gluon plasma formed in ultrarelativistic ion collisions, the ATLAS experiment at the LHC measures a correlation between the mean transverse momentum and the flow harmonics. The analysis uses data samples of lead-lead and proton-lead collisions obtained at the centre-of-mass energy per nucleon pair of 5.02 TeV, corresponding to total integrated luminosities of $$22~\upmu \text {b}^{-1}$$22μb-1 and $$28~\text {nb}^{-1}$$28nb-1, respectively. The measurement is performed using a modified Pearson correlation coefficient with the charged-particle tracks on an event-by-event basis. The modified Pearson correlation coefficients for the 2nd-, 3rd-, and 4th-order flow harmonics are measured in the lead-lead collisions as a function of event centrality quantified as the number of charged particles or the number of nucleons participating in the collision. The measurements are performed for several intervals of the charged-particle transverse momentum. The correlation coefficients for all studied harmonics exhibit a strong centrality evolution, which only weakly depends on the charged-particle momentum range. In the proton-lead collisions, the modified Pearson correlation coefficient measured for the 2nd-order flow harmonics shows only weak centrality dependence. The lead-lead data is qualitatively described by the predictions based on the hydrodynamical model.
Item Description:Im Titel stehen die Buchstaben "s" und "NN" unter dem Wurzelzeichen
Gesehen am 12.02.2020
The ATLAS Collaboration: C. Anders, V. Andrei, C. Antel, A. Bolz, M. Dunford, D.E. Ferreira de Lima, S. Franchino, M.P. Geisler, L. Helary [und weitere]
Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-019-7489-6

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