Abstract
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 result, the detailed calculations are performed for future experiments at the NICA collider. We find that the expected BFPP cross sections for the \(\hbox {Au}^{79+}\)–\(\hbox {Au}^{79+}\) and \(\hbox {Bi}^{83+}\)–\(\hbox {Bi}^{83+}\) collisions are in the range from 10 to 70 barn, while for the p–\(\hbox {Au}^{79+}\) and p–\(\hbox {Bi}^{83+}\) collisions they are in the range of a few mbarn.
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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: This is a theoretical study and no experimental data has been listed.]
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Acknowledgements
We are grateful to I. Meshkov who attracted our attention to this problem and explained us the details of the NICA collider. The stimulating discussions with A. Milstein, V. Parkhomchuk and A. Surzhykov are gratefully acknowledged.
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Communicated by Reinhard Alkofer
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Bauer, D.A., Karlovets, D.V. & Serbo, V.G. Bound-free pair production in relativistic nuclear collisions from the NICA to the HE LHC colliders. Eur. Phys. J. A 56, 200 (2020). https://doi.org/10.1140/epja/s10050-020-00208-7
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DOI: https://doi.org/10.1140/epja/s10050-020-00208-7