CROSS SECTION OF THE PROCESS 𝑒+𝑒− → 𝑛𝑛 NEAR THE THRESHOLD

M. N Achasov; Ачасов М. Н; A. Yu Barnyakov; Барняков А. Ю; E. V Bedarev; Бедарев Е. В; K. I Beloborodov; Белобородов К. И; A. V Berdyugin; Бердюгин А. В; A. G Bogdanchikov; Богданчиков А. Г; A. A Botov; Ботов А. А; T. V Dimova; Димова Т. В; V. P Druzhinin; Дружинин В. П; V. N Zhabin; Жабин В. Н; Yu. M Zharinov; Жаринов Ю. М; L. V Kardapoltsev; Кардапольцев Л. В; A. S Kasaev; Касаев А. С; A. A Katsin; Катцин А. А; D. P Kovrizhin; Коврижин Д. П; A. A Korol; Король А. А; A. S Kupich; Купич А. С; A. P Kryukov; Крюков А. П; A. P Lysenko; Лысенко А. П; N. A Melnikova; Мельникова Н. А; N. Yu Muchnoy; Мучной Н. Ю; A. E Obrazovsky; Образовский А. Е; E. V Pakhtusova; Пахтусова Е. В; K. V Pugachev; Пугачев К. В; S. A Rastigeev; Растигеев С. А; Yu. A Rogovsky; Роговский Ю. А; A. I Senchenko; Сенченко А. И; S. I Serednyakov; Середняков С. И; Z. K Silagadze; Силагадзе З. К; I. K Surin; Сурин И. К; Yu. V Usov; Усов Ю. В; A. G Kharlamov; Харламов А. Г; D. E Chistyakov; Чистяков Д. Э; Yu. M Shatunov; Шатунов Ю. М; S. P Sherstyuk; Шерстюк С. П; D. A Shtol; Штоль Д. А

doi:10.31857/S0044002724050057

CROSS SECTION OF THE PROCESS 𝑒+𝑒− → 𝑛𝑛 NEAR THE THRESHOLD

Authors: Achasov M.N¹^,2, Barnyakov A.Y.¹^,2, Bedarev E.V¹^,2, Beloborodov K.I¹^,2, Berdyugin A.V¹^,2, Bogdanchikov A.G¹, Botov A.A¹, Dimova T.V¹^,2, Druzhinin V.P¹^,2, Zhabin V.N¹^,2, Zharinov Y.M¹, Kardapoltsev L.V¹^,2, Kasaev A.S¹, Katsin A.A¹, Kovrizhin D.P¹, Korol A.A¹^,2, Kupich A.S¹^,2, Kryukov A.P¹, Lysenko A.P¹, Melnikova N.A¹, Muchnoy N.Y.¹^,2, Obrazovsky A.E¹, Pakhtusova E.V¹, Pugachev K.V¹^,2, Rastigeev S.A¹, Rogovsky Y.A¹^,2, Senchenko A.I¹, Serednyakov S.I¹^,2, Silagadze Z.K¹^,2, Surin I.K¹, Usov Y.V¹, Kharlamov A.G¹^,2, Chistyakov D.E¹^,2, Shatunov Y.M¹, Sherstyuk S.P¹^,2, Shtol D.A¹
Affiliations:
1. Budker Institute of Nuclear Physics of Siberian Branch Russian Academy of Sciences
2. Novosibirsk State University
Issue: Vol 87, No 5 (2024)
Pages: 400-413
Section: ЭЛЕМЕНТАРНЫЕ ЧАСТИЦЫ И ПОЛЯ. Эксперимент
URL: https://journals.rcsi.science/0044-0027/article/view/275052
DOI: https://doi.org/10.31857/S0044002724050057
EDN: https://elibrary.ru/JFRIPU
ID: 275052

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Abstract

The 𝑒+𝑒− → 𝑛𝑛 cross section was measured at energies from the threshold to 1908 MeV in the center of mass (c.m.). 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 (𝑛𝑛) events. A special time measurement system on the calorimeter was used to select the time-delayed 𝑛𝑛 events. The measured 𝑒+𝑒− → 𝑛𝑛 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.

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CROSS SECTION OF THE PROCESS 𝑒+𝑒− → 𝑛𝑛 NEAR THE THRESHOLD

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Abstract

About the authors

References

Supplementary files