dorsal/arxiv
View SchemaProduction of $\omega$-mesons in proton-proton collisions
| Authors | K. Nakayama, A. Szczurek, C. Hanhart, J. Haidenbauer, J. Speth |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9802013 |
| URL | https://arxiv.org/abs/nucl-th/9802013 |
| DOI | 10.1103/PhysRevC.57.1580 |
| Journal | Phys.Rev.C57:1580-1587,1998 |
Abstract
The production of $\omega$-mesons in proton-proton collisions for proton incident energies up to 2.2 GeV is investigated within a meson-exchange model of hadronic interactions. We find a large cancellation between the dominant $\pi\rho\omega$ meson-exchange current and nucleonic current contributions. A comparison with preliminary data from SATURNE calls for the inclusion of off-shell form factors at the $NN\omega$ and $\pi\rho\omega$ production vertices. Due to the present lack of knowledge of these form factors, together with the destructive interference mentioned above, the relative magnitude of the nucleonic and meson-exchange current contributions cannot be determined from existing total cross section data. However, it is shown that the angular distribution of the produced $\omega$-mesons provides an unique and clear signature of the magnitude of these currents, thus allowing one to disentangle these two basic reaction mechanisms.
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"abstract": "The production of $\\omega$-mesons in proton-proton collisions for proton\nincident energies up to 2.2 GeV is investigated within a meson-exchange model\nof hadronic interactions.\n We find a large cancellation between the dominant $\\pi\\rho\\omega$\nmeson-exchange current and nucleonic current contributions. A comparison with\npreliminary data from SATURNE calls for the inclusion of off-shell form factors\nat the $NN\\omega$ and $\\pi\\rho\\omega$ production vertices. Due to the present\nlack of knowledge of these form factors, together with the destructive\ninterference mentioned above, the relative magnitude of the nucleonic and\nmeson-exchange current contributions cannot be determined from existing total\ncross section data. However, it is shown that the angular distribution of the\nproduced $\\omega$-mesons provides an unique and clear signature of the\nmagnitude of these currents, thus allowing one to disentangle these two basic\nreaction mechanisms.",
"arxiv_id": "nucl-th/9802013",
"authors": [
"K. Nakayama",
"A. Szczurek",
"C. Hanhart",
"J. Haidenbauer",
"J. Speth"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.57.1580",
"journal_ref": "Phys.Rev.C57:1580-1587,1998",
"title": "Production of $\\omega$-mesons in proton-proton collisions",
"url": "https://arxiv.org/abs/nucl-th/9802013"
},
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