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Quasielastic knocking-out of neutral pions from a nucleon by high-energy electrons and the structure of an $\omega$-meson cloud of a nucleon

N.P. Yudin, L.L. Sviridova, V.G. Neudachin

Moscow University Physics Bulletin 1999. 54. N 3. P. 22

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Annotation

It is shown that in the kinematic range $Q^2\ge3$ GeV$^2/c^2$, $Q^2\gg k^2$, the main contribution into the cross section $d\sigma_T/d(k^2)$ of neutral pions electroproduction is made by the process of qnasielastic knocking-out of $\rho^0$- and $\omega$-mesons followed by their restructuring into a $\pi^0$-meson. It is proposed to use this property of electroproduction for directly probing the structure of the nucleon $\omega$-meson cloud, which will allow one to determine not only the momentum distribution of the $\omega$-meson in the nucleon, the spectroscopic factor of its separation, and the constant of $\omega NN$ interaction, but also the relative sign of the $G_{\rho NN}$ and $G_{\omega NN}$ constants.

Authors
N.P. Yudin, L.L. Sviridova, V.G. Neudachin
Research Institute of Nuclear Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
Issue 3, 1999

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