Enhancement of low-mass dileptons in ultraperipheral collisions

I. M. Dremin, S. R. Gevorkyan, D. T. Madigozhin

It is shown that production of low-mass $e^{+}{e}^{-}$-pairs in ultraperipheral nuclear collisions is enhanced due to the Sommerfeld-Gamow-Sakharov (SGS) factor. This effect is especiall…