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arXiv 2001.03747hep-exnucl-ex
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用强子量热计确定核碰撞的中心性

Determination of centrality in nuclear collisions by using hadron calorimeter

A. Kurepin, A. Litvinenko, E. Litvinenko

摘要:

核碰撞中心性或重核碰撞参量值的确定,对于分析所有实验数据和与理论进行比较具有重要意义。一种方法是使用强子量热计测量观众的数量,强子量热计与核束成一个小角度。结果表明,在强子量热计能量分辨率达到一定程度的情况下,在MPD / NICA和CBM / FAIR计划中使用强子量热计测定碰撞参量的精度是不够的。在束流能量为2.5GeV时,即使是外围碰撞,误差也达到35%.二次过程中的观众通过核的通道提供了一个额外的贡献,中央碰撞的错误,并在中等中心。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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