In this paper, we present the form factor $$\gamma {\text{*}}\omega {{\pi }^{0}}$$ measurement in the virtual photon mass range 1 GeV < $$\sqrt {{{q}^{2}}} $$ < 2 GeV in the $${{e}^{ + }}{{e}^{ - }} \to \omega {{\pi }^{0}} \to {{\pi }^{ + }}{{\pi }^{ - }}{{\pi }^{0}}{{\pi }^{0}}$$ process. Measurements are based on the data acquired by the SND detector at the VEPP-2000 $${{e}^{ + }}{{e}^{ - }}$$ collider in Novosibirsk. The obtained form factor is approximated in the vector meson dominance (VMD) model. The joint fitting of the form factor obtained in the SND and NA60 experiments is also performed.
The cross section for the e + e – → π+π–π0 process in the energy range 1.05–2.00 GeV has been measured using the data collected in the experiment with the Spherical Neutral Detector (SND) at the VEPP-2000 e + e – collider. The obtained results on the cross section are in good agreement with previous measurements by the SND at the VEPP-2M collider and BABAR, but have a better accuracy.
Приводится описание новой трековой системы (ТС) детектора СНД для экспериментов на -коллайдере ВЭПП-2000. ТС полностью собрана, установлена на детектор и готова к работе в режиме сбора данных с ВЭПП-2000. Тестовые эксперименты с космическими событиями и с пучками ВЭПП-2000 показали устойчивую работоспособность системы. По имеющимся данным были отлажены процедуры моделирования, калибровки и реконструкции.