Details

Autor(en) / Beteiligte

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

Titel

Enhancement of low-mass dileptons in ultraperipheral collisions

Ist Teil von

• The European physical journal. C, Particles and fields, 2021-04, Vol.81 (4), p.1-5, Article 276

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 especially strong near the threshold of creation of unbound e + e - -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.