Nucleon-number scalings of anisotropic flows and nuclear modification factor for light nuclei in the squeeze-out region

Abstract

The number of nucleon (NN) scaling of the directed flow v1 and elliptic flow (v2) as well as the nuclear modification factor (Rcp) are tested for light nuclei which are produced in 0.4A GeV 197 Au + 197 Au collisions at different impact parameters with two different in-medium nucleon-nucleon cross sections in the framework of an isospin-dependent quantum molecular dynamics (IQMD) model. In that energy domain, the emission of light nuclei can be well described by the squeeze-out phenonomenon. The results show a nice NN scaling behavior for flow parameters v1, v2 and Rcp. These results demonstrate that the nucleon coalescence mechanism is responsible for nucleon-number scaling of above physical observables in squeezeout region in heavy-ion collisions at intermediate energy.

Collision centrality and system size dependences of light nuclei production via dynamical coalescence mechanism

“…Thermal models [22][23][24][25] have successfully described the yields of hadrons and nuclei. Besides, the coalescence model has been used to describe the production of light nuclei for many years [26][27][28][29][30][31][32]. These calculations by using a similar coalescence mechanism coupled with phase-space distribution from different models, such as blast-wave model and transport model, seem to resemble each other of description for light nuclei production at RHIC and LHC energies.…”