493 research outputs found

    Measurement of hadron cross sections with the SND detector

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    New results on exclusive hadron production in e+ee^+e^- annihilation obtained in experiments with the SND detector at the VEPP-2M and VEPP-2000 e+ee^+e^- colliders are presented.Comment: 4 pages, 4 figures, presented at the 14th International Workshop on Meson Production, Properties and Interaction (MESON 2016), Cracow, Poland, 2nd - 7th June 201

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

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    The results of the measurement of the e+ennˉe^+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+ee^+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.Comment: 13 pages, 8 figure