Accessing the in-medium effects on nucleon-nucleon elastic cross section with collective flows and nuclear stopping

Abstract

A systematic study of the in-medium correction factor ($F$) on nucleon-nucleon elastic cross section is performed within the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) model. The effects of the beam energy dependence of $F$ on the directed, elliptic flow and nuclear stopping in ${}^{197}$Au+${}^{197}$Au collisions with energy ranging from $0.09$ to $0.8A$ GeV are explored. It is found that the directed, elliptic flow and nuclear stopping at relatively low energies are very sensitive to $F$, and the sensitivity gradually weakens with increasing beam energy. The beam energy dependent in-medium correction factor $F$ is deduced from the comparison of the excitation functions of the directed, elliptic flow and nuclear stopping between the calculated results and the FOPI experimental data.

8 pages, 9 figures

References in corpus (6)

• Systematics of pion emission in heavy ion collisions in the 1A GeV regime
• Systematics of central heavy ion collisions in the 1A GeV regime
• Systematics of Stopping and Flow in Au+Au Collisions
• Comparison of Heavy-Ion Transport Simulations: Mean-field Dynamics in a Box
• Transport approaches for the Description of Intermediate-Energy Heavy-Ion Collisions
• $\alpha$-clustering effect on flows of direct photons in heavy-ion collisions