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首页> 外文期刊>Physics of atomic nuclei >Determining the Centrality of a Nuclear Collision Using a Hadron Calorimeter
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Determining the Centrality of a Nuclear Collision Using a Hadron Calorimeter

机译:使用强子热量计确定核碰撞的中心

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Determining the centrality of a collision, or the impact parameter, in heavy-nucleus collisions is important for the analysis of all experimental data and their comparison with theory. One of the methods for this is to measure the number of spectators using a hadron calorimeter arranged at a small angle to the nuclear beam. It is shown that the accuracy in determining the impact parameter at the attainable energy resolution of the hadron calorimeter is inadequate for using the calorimeter in the MPD/NICA and CBM/FAIR projects. The error is as large as 35% at the beam energy of 2.5 GeV even for peripheral collisions. Secondary processes during the motion of spectators through a nucleus make an additional contribution to the error for central and mid-central collisions.
机译:在重核碰撞中,确定碰撞中心或碰撞参数对于分析所有实验数据及其与理论的比较非常重要。其中一种方法是使用强子量热计测量观众人数,该量热计与核束成小角度布置。结果表明,在MPD/NICA和CBM/FAIR项目中,在强子量热计可达到的能量分辨率下确定冲击参数的准确性不足以使用量热计。在束流能量为2.5GeV时,即使是周边碰撞,误差也高达35%。观众通过原子核的运动过程中的次级过程对中心碰撞和中中心碰撞的误差有额外的贡献。

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