Interplay between hard and soft processes in HYDJET++ model

Abstract

The Monte Carlo event generator HYDJET++ (HYDrodynamics with JETs) contains the description of both soft and hard processes in relativistic heavy-ion collisions by combining the parametrized hydrodynamics with the treatment of jets. The interplay of hard and soft processes describes the violation of the mass hierarchy of meson and baryon elliptic $(v_2)$ and triangular $(v_3)$ flows at intermediate transverse momenta, the fall-off of the flow harmonics after the certain $p_T$ threshold, and the worsening of the number-of-constituent-quark (NCQ) scaling of $v_2$ and $v_3$ at LHC energies compared to that at RHIC ones. The role of this interplay in di-hadron correlations and in production of open and hidden charm in heavy-ion collisions at RHIC and LHC energies is also discussed.