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Measuring the Neutron Timelike Electromagnetic Form Factor with the SND Detector

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Abstract

Results are presented from measuring the \(e^{+}e^{-}\to n\bar{n}\) cross section and effective neutron timelike form factor. Data are collected in 2020–2021 at the VEPP-2000 \(e^{+}e^{-}\) collider in the 1891 to 2007 MeV center-of-mass range of energies. The general purpose nonmagnetic SND detector is used to detect neutron–antineutron events. The time-of-flight approach is used to select \(n\bar{n}\) events. The measured cross section is 0.4–0.6 nbn. The neutron form factor in the investigated range of energies varies from 0.3 to 0.2.

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Funding

This work was supported by the Russian Science Foundation, grant no. 23-22-00011.

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Authors and Affiliations

  1. Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia

    M. N. Achasov, A. Yu. Barnyakov, E. V. Bedarev, K. I. Beloborodov, A. V. Berdyugin, D. E. Berkaev, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, V. P. Druzhinin, V. N. Zhabin, Yu. M. Zharinov, L. V. Kardapoltsev, A. S. Kasaev, D. P. Kovrizhin, I. A. Koop, A. A. Korol, A. S. Kupich, A. P. Kryukov, A. P. Lysenko, N. A. Melnikova, N. Yu. Muchnoi, A. E. Obrazovsky, E. V. Pakhtusova, K. V. Pugachev, S. A. Rastigeev, Yu. A. Rogovsky, S. I. Serednyakov, Z. K. Silagadze, I. K. Surin, Yu. V. Usov, A. G. Kharlamov, Yu. M. Shatunov & D. A. Shtol

  2. Novosibirsk State University, 630090, Novosibirsk, Russia

    M. N. Achasov, A. Yu. Barnyakov, E. V. Bedarev, K. I. Beloborodov, A. V. Berdyugin, T. V. Dimova, V. P. Druzhinin, V. N. Zhabin, L. V. Kardapoltsev, I. A. Koop, A. A. Korol, A. S. Kupich, N. A. Melnikova, N. Yu. Muchnoi, K. V. Pugachev, Yu. A. Rogovsky, S. I. Serednyakov, Z. K. Silagadze & A. G. Kharlamov

Authors
  1. M. N. Achasov
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  2. A. Yu. Barnyakov
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  3. E. V. Bedarev
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  4. K. I. Beloborodov
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  5. A. V. Berdyugin
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  6. D. E. Berkaev
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  7. A. G. Bogdanchikov
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  8. A. A. Botov
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  9. T. V. Dimova
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  10. V. P. Druzhinin
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  11. V. N. Zhabin
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  12. Yu. M. Zharinov
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  13. L. V. Kardapoltsev
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  14. A. S. Kasaev
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  15. D. P. Kovrizhin
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  16. I. A. Koop
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  17. A. A. Korol
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  18. A. S. Kupich
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  19. A. P. Kryukov
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  20. A. P. Lysenko
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  21. N. A. Melnikova
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  22. N. Yu. Muchnoi
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  23. A. E. Obrazovsky
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  24. E. V. Pakhtusova
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  25. K. V. Pugachev
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  26. S. A. Rastigeev
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  27. Yu. A. Rogovsky
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  28. S. I. Serednyakov
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  29. Z. K. Silagadze
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  30. I. K. Surin
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  31. Yu. V. Usov
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  32. A. G. Kharlamov
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  33. Yu. M. Shatunov
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  34. D. A. Shtol
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Corresponding author

Correspondence to S. I. Serednyakov.

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The authors of this work declare that they have no conflicts of interest.

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Achasov, M.N., Barnyakov, A.Y., Bedarev, E.V. et al. Measuring the Neutron Timelike Electromagnetic Form Factor with the SND Detector. Phys. Atom. Nuclei 86, 1165–1172 (2023). https://doi.org/10.1134/S1063778823060054

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  • DOI: https://doi.org/10.1134/S1063778823060054

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