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- W4226410012 abstract "Perturbative and non-perturbative terms of the cross sections of ultraperipheral production of lepton pairs in ion collisions are taken into account. It is shown that production of low-mass $e^+e^-$ pairs is strongly enhanced (compared to perturbative estimates) due to the non-perturbative Sommerfeld-Gamow-Sakharov (SGS) factor. Coulomb attraction of the non-relativistic components of those pairs leads to the finite value of their mass distribution at lowest relative velocities. Their annihilation can result in the increased intensity of 511 keV photons. It can be recorded at the NICA collider and is especially crucial in astrophysical implications regarding the 511 keV line emitted from the Galactic center. The analogous effect can be observed in lepton pairs production at LHC. Energy spectra of lepton pairs created in ultraperipheral nuclear collisions and their transverse momenta are calculated." @default.
- W4226410012 created "2022-05-05" @default.
- W4226410012 creator A5027000022 @default.
- W4226410012 date "2021-12-01" @default.
- W4226410012 modified "2023-09-28" @default.
- W4226410012 title "Perturbative and non-perturbative effects in ultraperipheral production of lepton pairs" @default.
- W4226410012 hasPublicationYear "2021" @default.
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