D-meson azimuthal anisotropy in mid-central Pb-Pb collisions at \(\mathbf{\sqrt{s_{\rm NN}}=5.02}\) TeV

Abstract

The azimuthal anisotropy coefficient \(v_2\) of prompt D\)^0\), D\)^+\), D\)^{*+}\) and D\(_s^+\) mesons was measured in mid-central (30-50% centrality class) Pb-Pb collisions at a centre-of-mass energy per nucleon pair \(\sqrt{s_{\rm NN}} = 5.02\) TeV, with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decays at mid-rapidity, \(|y|<0.8\), in the transverse momentum interval \(1<p_{\rm T}<24\) GeV/\(c\), The measured D-meson \(v_2\) has similar values as that of charged pions. The D\(_s^+\) \(v_2\), measured for the first time, is found to be compatible with that of non-strange D mesons. The measurements are compared with theoretical calculations of charm-quark transport in a hydrodynamically expanding medium and have the potential to constrain medium parameters.