Orateur
Description
We simulate deuteron production in Pb+Pb collisions at 2.76 TeV and focus particularly on the elliptic flow. Two models for the production are compared: direct thermal production and coalescence. In coalescence, the yield of deuterons with certain momentum depends on the size of the region producing the nucleons from which the deuteron is composed. The elliptic flow also depends on how the size of the effective emitting region varies for the emission in different azimuthal directions. Thus the elliptic flow of deuterons from coalescence is expected to be sensitive to the azimuthal anisotropy of the fireball more or at least differently than in case of thermal production. We test this idea by using the blast-wave model to parametrize the emission of hadrons and also deuterons in case of thermal production. We tune the model very carefully on proton and pion data for spectra and differential elliptic flow, which constrains it quite precisely. It turns out that coalescence leads to higher elliptic flow than the thermal production and is in better agreement with current data.
The presentation is based on https://arxiv.org/abs/2402.06327.
