论文标题
通过使用强子量动仪确定核冲突中的中心性
Determination of centrality in nuclear collisions by using hadron calorimeter
论文作者
论文摘要
确定核冲突的中心性或重核的影响参数的值对于分析所有实验数据并与理论进行比较至关重要。一种方法是使用位于核束小角度的强子量热计测量观众数量。结果表明，通过在能量上可以实现强子量热计的可实现分辨率，确定影响参数的准确性不足以在MPD / NICA和CBM / FAIR项目中使用量热计。即使对于外围碰撞，该误差在2.5 GEV时达到35％。观众通过细胞核通过期间的次要过程为中央碰撞和中核心的误差做出了额外的贡献。
The determination of the centrality of nuclear collision or the value of the impact parameter of heavy nuclei is of great importance for the analysis of all experimental data and comparison with theory. One method is to measure the number of spectators using a hadron calorimeter located at a small angle to the nuclear beam. It is shown that with an achievable resolution of the hadron calorimeter in energy, the accuracy of determining the impact parameter is insufficient for using the calorimeter in the MPD / NICA and CBM / FAIR projects. The error reaches 35 % at a beam energy of 2.5 GeV even for peripheral collisions. Secondary processes during the passage of spectators through the nucleus give an additional contribution to the error for central collisions and at medium centralities.
