Transverse-momentum and event-shape dependence of D-meson flow harmonics in Pb-Pb collisions at √SNN=5 . 02 TeV



Acharya, S, Adamova, D, Adler, A, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S
et al (show 1013 more authors) (2021) Transverse-momentum and event-shape dependence of D-meson flow harmonics in Pb-Pb collisions at √SNN=5 . 02 TeV PHYSICS LETTERS B, 813. 136054-. ISSN 0370-2693, 1873-2445

Access the full-text of this item by clicking on the Open Access link.

Abstract

The elliptic and triangular flow coefficients v<inf>2</inf> and v<inf>3</inf> of prompt D<sup>0</sup>, D<sup>+</sup>, and D<sup>⁎+</sup> mesons were measured at midrapidity (|y|<0.8) in Pb–Pb collisions at the centre-of-mass energy per nucleon pair of s<inf>NN</inf>=5.02TeV with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decays in the transverse momentum interval 1<p<inf>T</inf><36GeV/c in central (0–10%) and semi-central (30–50%) collisions. Compared to pions, protons, and J/ψ mesons, the average D-meson v<inf>n</inf> harmonics are compatible within uncertainties with a mass hierarchy for p<inf>T</inf>≲3GeV/c, and are similar to those of charged pions for higher p<inf>T</inf>. The coupling of the charm quark to the light quarks in the underlying medium is further investigated with the application of the event-shape engineering (ESE) technique to the D-meson v<inf>2</inf> and p<inf>T</inf>-differential yields. The D-meson v<inf>2</inf> is correlated with average bulk elliptic flow in both central and semi-central collisions. Within the current precision, the ratios of per-event D-meson yields in the ESE-selected and unbiased samples are found to be compatible with unity. All the measurements are found to be reasonably well described by theoretical calculations including the effects of charm-quark transport and the recombination of charm quarks with light quarks in a hydrodynamically expanding medium.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 26 Jan 2021 16:12
Last Modified: 16 Jun 2026 08:36
DOI: 10.1016/j.physletb.2020.136054
Open Access URL: https://doi.org/10.1016/j.physletb.2020.136054
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3114858
Disclaimer: The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.