Measurement of flow harmonics correlations with mean transverse momentum in lead-lead and proton-lead collisions at $\sqrt{s_{NN}}=5.02$ TeV with the ATLAS detector
ATLAS Collaboration
TL;DR
This paper measures correlations between flow harmonics and mean transverse momentum in lead-lead and proton-lead collisions at 5.02 TeV to understand quark-gluon plasma properties, using the ATLAS detector and a modified Pearson coefficient.
Contribution
It introduces a measurement of flow harmonic correlations with mean transverse momentum using a modified Pearson coefficient in heavy-ion collisions at the LHC.
Findings
Strong centrality dependence in lead-lead collisions
Weak centrality dependence in proton-lead collisions
Qualitative agreement with hydrodynamical model predictions
Abstract
To assess the properties of the quark-gluon plasma formed in heavy-ion collisions, the ATLAS experiment at the LHC measures a correlation between the mean transverse momentum and the magnitudes of 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 and , 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 -, 3-, and 4-order harmonics are measured 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…
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