Speaker
Igor Dremin
(Russian Academy of Sciences (RU))
Description
Spectra of dilepton pairs in ultraperipheral nuclear collisions
are calculated. It is shown that production of low-mass e+e- pairs is enhanced due to the Sommerfeld-Gamow-Sakharov (SGS) factor. This effect is especially strong near the threshold of creation of unbound 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.
Primary author
Igor Dremin
(Russian Academy of Sciences (RU))
