Faculty of Physics
M.V. Lomonosov Moscow State University
Menu
Regular Article

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

  • Article
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

Moscow University Physics Bulletin

Science News of the Faculty of Physics, Lomonosov Moscow State University

This new information publication, which is intended to convey to the staff, students and graduate students, faculty colleagues and partners of the main achievements of scientists and scientific information on the events in the life of university physicists.