Regular Article - Experimental Physics
Experimental study of the process at the VEPP-2000 collider with the SND detector
Budker Institute of Nuclear Physics, SB RAS, 630090, Novosibirsk, Russia
2 Novosibirsk State University, 630090, Novosibirsk, Russia
3 Novosibirsk State Technical University, 630073, Novosibirsk, Russia
Accepted: 9 August 2022
Published online: 30 August 2022
The process is studied in the experiment at the VEPP-2000 collider with the SND detector. The technique of the time measurements in the multichannel NaI(Tl) electromagnetic calorimeter is used to select events. The value of the measured cross section in the center-of-mass energy range from 1.894 to 2 GeV varies from 0.5 to 0.35 nb. The effective neutron timelike form factor is derived from the measured cross section and compared with the proton form factor. The ratio of the neutron electric and magnetic form factors is obtained from the analysis of the antineutron polar angle distribution and found to be consistent with unity.
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