Omega- and Phi-meson production in pn -> dV reactions and OZI-rule violation
Abstract
We investigate the reactions p n -> d omega and p n -> d phi close to threshold and at higher energies. Near threshold we calculate the S-wave amplitudes within the framework of the two-step model which is described by a triangle graph with pi-mesons in the intermediate state and find a ratio of the S-wave amplitudes squared of R =|A(phi)|^2/|A(omega)|^2 = (4-8) x 10^{-3}. Any significant enhancement of the experimental value of R(phi/omega) over this prediction can be interpreted as a possible contribution of the intrinsic s - anti s component in the nucleon-wave function. We present arguments that there is a strong resonance effect in the omega N channel close to threshold. At higher energies we calculate the differential cross sections of the reactions p n -> d omega, p n -> d phi and the ratio of the phi/omega yields within the framework of the quark-gluon string model. An irregular behavior of the phi/omega-ratio is found at s <= 12 GeV^2 due to the interference of the t- and u-channel contributions.
Keywords
Cite
@article{arxiv.nucl-th/9808050,
title = {Omega- and Phi-meson production in pn -> dV reactions and OZI-rule violation},
author = {L. A. Kondratyuk and Ye. S. Golubeva and M. Buescher},
journal= {arXiv preprint arXiv:nucl-th/9808050},
year = {2007}
}
Comments
19 pages, 7 figures, gzipped tar file