Elliptic and triangular flow of (anti)deuterons in Pb-Pb collisions at √ s NN = 5.02 TeV

The measurements of the (anti)deuteron elliptic flow (v2) and the first measurements of triangular flow (v3)
in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon collision √sNN = 5.02 TeV are presented.
A mass ordering at low transverse momentum (pT) is observed when comparing these measurements with those
of other identified hadrons, as expected from relativistic hydrodynamics. The measured (anti)deuteron v2 lies
between the predictions from the simple coalescence and blast-wave models, which provide a good description
of the data only for more peripheral and for more central collisions, respectively. The mass number scaling, which
is violated for v2, is approximately valid for the (anti)deuterons v3. The measured v2 and v3 are also compared
with the predictions from a coalescence approach with phase-space distributions of nucleons generated by IEBEVISHNU with AMPT initial conditions coupled with URQMD, and from a dynamical model based on relativistic
hydrodynamics coupled to the hadronic afterburner SMASH. The model predictions are consistent with the data
within the uncertainties in midcentral collisions, while a deviation is observed in the most central collisions.