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arXiv 2006.01377hep-phnucl-th
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从NICA到HE LHC对撞机的相对论核碰撞中束缚-自由对的产生

Bound-free pair production in relativistic nuclear collisions from the NICA to the HE LHC colliders

D. A. Bauer, D. V. Karlovets, V. G. Serbo

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10 pages, 6 figures
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摘要：

我们考虑相对论性重离子碰撞中电子-正电子对的产生，其中产生的电子被其中一个核俘获，从而形成类氢离子。这些离子从碰撞点出来，撞击超导磁体内的真空室壁。因此，这个过程可能是重要的束寿命的问题，并为淬火照射磁铁。本文对从NICA到HE LHC对撞机上的束缚-自由对产生（BFPP）进行了理论研究。我们得到了过程总截面的近似普适公式。我们比较它与现有的数值计算的结果，并估计，我们的计算的准确性是优于$30$ %的能量的NICA对撞机和RHIC和HE LHC对撞机的百分之几的顺序。根据所得结果，进行了详细的计算，为今后的实验在NICA对撞机。我们发现Au $^{79+}$ -Au $^{79+}$和Bi $^{83+}$ -Bi $^{83+}$碰撞的BFPP截面在$10$到$70$的范围内，而p-Au $^{79+}$和p-Bi $^{83+}$碰撞的BFPP截面在几个mbarn的范围内.

英文摘要：

We consider the electron-positron pair production in relativistic heavy ion collisions, in which the produced electron is captured by one of the nuclei resulting, thus, in the formation of a hydrogen--like ion. These ions emerge from the collision point and hit the vacuum chamber wall inside superconducting magnets. Therefore, this process may be important for the problems of beam life time and for the quenching the irradiated magnet. A theoretical investigation for such a bound-free pair production (BFPP) at the colliders from NICA to HE LHC is presented. We obtain an approximate universal formula for the total cross section of the process. We compare it with the results of available numerical calculations and estimate that an accuracy of our calculations is better than $30$ % at the energies of the NICA collider and becomes of the order of a few percent for the RHIC and HE LHC colliders. Based on the obtained results, the detailed calculations are performed for future experiments at the NICA collider. We find that the expected BFPP cross sections for the Au$^{79+}$-Au$^{79+}$ and Bi$^{83+}$-Bi$^{83+}$ collisions are in the range from $10$ to $70$ barn, while for the p-Au$^{79+}$ and p-Bi$^{83+}$ collisions they are in the range of a few mbarn.

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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