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Measurement of the neutron timelike electromagnetic form factor with the SND detector

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arxiv 2309.05241 v1 pith:4XDLG63J submitted 2023-09-11 hep-ex

Measurement of the neutron timelike electromagnetic form factor with the SND detector

SND Collaboration: M. N. Achasov , A. Yu. Barnyakov , E. V. Bedarev , K. I. Beloborodov , A. V. Berdyugin , D. E. Berkaev , A.G. Bogdanchikov , A. A. Botov
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T. V. Dimova V. P. Druzhinin V. N. Zhabin Yu. M. Zharinov E. 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. Muchnoy 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
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The results of the measurement of the $e^+e^- \to n \bar{n}$ cross section and effective neutron timelike form factor are presented. The data taking was carried out in 2020-2021 at the VEPP-2000 $e^+e^-$ collider in the center-of-mass energy range from 1891 to 2007 MeV. The general purpose nonmagnetic detector SND is used to detect neutron-antineutron events. The event selection is performed using the time-of-flight technique. The measured cross section is 0.4-0.6 nb. The neutron form factor in the energy range under study varies from 0.3 to 0.2.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The anomalous magnetic moment of the muon in the Standard Model: an update

    hep-ph 2025-05 accept novelty 5.0

    The updated SM prediction for the muon anomalous magnetic moment is 116592033(62)×10^{-11}, showing no tension with the experimental average of 38(63)×10^{-11}.

  2. Measurement of the neutron timelike electric and magnetic form factors ratio at the VEPP-2000 $e^+e^-$ collider

    hep-ex 2026-01 unverdicted novelty 4.0

    The ratio |G_E|/|G_M| of neutron timelike form factors averages 1.21 ± 0.13 across eight energy points from 1.89 to 2.00 GeV.