Cross Section of the Process $${e^{+}e^{-}\to n\bar{n}}$$ near the Threshold
The $$e^{+}e^{-}\to n\bar{n}$$ cross section was measured at center of mass (c.m.) energies from the threshold to 1908 MeV. The experiment to measure the cross section has been carried out at the VEPP-2000 $$e^{+}e^{-}$$ collider in 13 energy points. The SND detector is used to detect the produced neutron–antineutrons ( $$n\bar{n}$$ ) events. A special time measurement system on the calorimeter was used to select the time-delayed $$n\bar{n}$$ events. The measured $$e^{+}e^{-}\to n\bar{n}$$ cross section is 0.4–0.6 nb. The neutron effective timelike form factor in the energy range under study varies from 0.3 to 0.6.
Authors
- A. P. Kryukov (ORCID: https://orcid.org/0000-0002-1624-6131)
- A. A. Botov
- Е. В. Пахтусова
- A. A. Korol (ORCID: https://orcid.org/0000-0001-8448-218X)
- A. Kupich
- A. Barnyakov (ORCID: https://orcid.org/0000-0002-8556-6622)
- Yu. M. Zharinov
- A. V. Berdyugin (ORCID: https://orcid.org/0000-0002-4999-3512)
- N. A. Melnikova (ORCID: https://orcid.org/0000-0002-5389-7400)
- L. V. Kardapoltsev
- A. S. Kasaev
- Y. Usov (ORCID: https://orcid.org/0000-0003-3144-2920)
- М. Н. Ачасов (ORCID: https://orcid.org/0000-0002-9400-8622)
- В. П. Дружинин (ORCID: https://orcid.org/0000-0001-5452-8909)
- З. К. Силагадзе (ORCID: https://orcid.org/0000-0003-0704-4199)
- I. K. Surin
- K. V. Pugachev
- S. A. Rastigeev (ORCID: https://orcid.org/0000-0003-0555-7935)
- E. V. Bedarev
- A. A. Kattsin
- S. P. Sherstyuk
- T. Dimova (ORCID: https://orcid.org/0000-0002-9560-0660)
- D. Shtol
- Yu. A. Rogovsky
- D. P. Kovrizhin
- A. G. Kharlamov
- N. Yu. Muchnoi (ORCID: https://orcid.org/0000-0003-2936-0029)
- A. G. Bogdanchikov
- S. I. Serednyakov
- V. N. Zhabin
- Yu. M. Shatunov
- А. П. Лысенко
- D. E. Chistyakov
- A. E. Obrazovsky
- A. I. Senchenko
- K. Beloborodov (ORCID: https://orcid.org/0000-0003-0945-4087)
Institutions
- Novosibirsk State University (RU)
- Budker Institute of Nuclear Physics (RU)
Publication Details
- Journal
- Physics of Atomic Nuclei
- Published
- 2024-10-01
- DOI
- https://doi.org/10.1134/s1063778824700637
- Citations
- 3
- Primary Topic
- Nuclear physics research studies
- Type
- article
- Field-Weighted Citation Impact
- 1.98