• DOI:10.1140/epjc/s10052-021-09053-4
• Corpus ID: 221377334

Enhancement of low-mass dileptons in ultraperipheral collisions

@article{Dremin2020EnhancementOL,
  title={Enhancement of low-mass dileptons in ultraperipheral collisions},
  author={I. M. Dremin and Sergey Gevorkyan and D. Madigozhin},
  journal={The European Physical Journal C},
  year={2020},
  volume={81}
}

• I. Dremin, S. Gevorkyan, D. Madigozhin
• Published 30 August 2020
• Physics
• The European Physical Journal C

It is shown that production of low-mass e+e-\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$e^+e^-$$\end{document}-pairs in ultraperipheral nuclear collisions is enhanced due to the Sommerfeld–Gamow–Sakharov (SGS) factor. This effect is especially strong near the threshold of creation of unbound e+e-\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$e^+e^-$$\end{document}-pairs with low masses in the two-photon fusion. Coulomb attraction of the non-relativistic components of such pairs may lead to the increased intensity of 511 keV photons. It can be recorded at the NICA collider and has some astrophysical implications. The analogous effect can be observed at LHC in dilepton production.