dorsal/arxiv
View SchemaOmega- and Phi-meson production in pn -> dV reactions and OZI-rule violation
| Authors | L. A. Kondratyuk, Ye. S. Golubeva, M. Buescher |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9808050 |
| URL | https://arxiv.org/abs/nucl-th/9808050 |
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.
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"abstract": "We investigate the reactions p n -\u003e d omega and p n -\u003e d phi close to\nthreshold and at higher energies. Near threshold we calculate the S-wave\namplitudes within the framework of the two-step model which is described by a\ntriangle graph with pi-mesons in the intermediate state and find a ratio of the\nS-wave amplitudes squared of R =|A(phi)|^2/|A(omega)|^2 = (4-8) x 10^{-3}. Any\nsignificant enhancement of the experimental value of R(phi/omega) over this\nprediction can be interpreted as a possible contribution of the intrinsic s -\nanti s component in the nucleon-wave function. We present arguments that there\nis a strong resonance effect in the omega N channel close to threshold. At\nhigher energies we calculate the differential cross sections of the reactions p\nn -\u003e d omega, p n -\u003e d phi and the ratio of the phi/omega yields within the\nframework of the quark-gluon string model. An irregular behavior of the\nphi/omega-ratio is found at s \u003c= 12 GeV^2 due to the interference of the t- and\nu-channel contributions.",
"arxiv_id": "nucl-th/9808050",
"authors": [
"L. A. Kondratyuk",
"Ye. S. Golubeva",
"M. Buescher"
],
"categories": [
"nucl-th"
],
"title": "Omega- and Phi-meson production in pn -\u003e dV reactions and OZI-rule violation",
"url": "https://arxiv.org/abs/nucl-th/9808050"
},
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