论文标题
通过集体流和核停止，访问对核子核子弹性横截面的中等效果
Accessing the in-medium effects on nucleon-nucleon elastic cross section with collective flows and nuclear stopping
论文作者
论文摘要
在超偏好的量子分子动力学（URQMD）模型中，对中等内校正因子（$ f $）的系统研究进行了研究。探索了$ f $的光束能量依赖性对$^{197} $ au+$^{197} $ au碰撞的定向，椭圆流和核停止的影响，探索了能源范围从$ 0.09 $到$ 0.8A $ GEV。发现在相对较低的能量下，定向的椭圆流和核停止对$ f $非常敏感，并且灵敏度随着束能量的增加而逐渐削弱。梁能量依赖性内部校正因子$ f $是根据定向，椭圆流的激发功能和计算结果之间的核停止的比较来得出的。
A systematic study of the in-medium correction factor ($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.
