Enhancement of low-mass dileptons in ultraperipheral collisions

被引：4
|
作者：
Dremin, I. M. [1 ]
Gevorkyan, S. R. [2 ]
Madigozhin, D. T. [2 ]
机构：
[1] Lebedev Phys Inst, Moscow, Russia
[2] Joint Inst Nucl Res, Dubna, Russia
来源：
EUROPEAN PHYSICAL JOURNAL C | 2021年 / 81卷 / 04期
关键词：
D O I：
10.1140/epjc/s10052-021-09053-4
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
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.
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页数：5
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