Study of the Form Factor $$\gamma {\text{*}}\omega {{\pi }^{0}}$$ Using the SND Detector

Novosibirsk State University,Barnyakov A. Yu., Novosibirsk State University, Bogdanchikov A. G.,Botov A. A.,Golubev V. B., Novosibirsk State University,Zhabin V. N., Novosibirsk State University,Kovrizhin D. P., Novosibirsk State University,Kupich A. S., Martin K. A., Mel’nikova N. A., Novosibirsk State University, Obrazovskii A. E.,Pakhtusova E. V., Novosibirsk State University,Surin I. K.,Usov Yu. V., Novosibirsk State University, Shtol’ D. A.

BULLETIN OF THE LEBEDEV PHYSICS INSTITUTE(2021)

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摘要
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.
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关键词
Electromagnetic form factor, vector meson dominance model, SND, VEPP-2000
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