dorsal/arxiv
View SchemaNear threshold eta production in proton-proton collisions
| Authors | M. Batinic, A. Svarc, T. -S. H. Lee |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9604043 |
| URL | https://arxiv.org/abs/nucl-th/9604043 |
| DOI | 10.1088/0031-8949/56/4/001 |
| Journal | Phys.Scripta 56 (1997) 321-324 |
Abstract
The total cross section for the near threshold eta production in proton-proton collisions has been investigated with the assumption that the production mechanism is due to the emission of a meson x (pi, eta, sigma) from one of the nucleons followed by a x N --> eta N transition on the second one. The x N --> eta N amplitudes are generated from the unitary multi-channel multi-resonance model which has recently been constructed in analyzing the pi N scattering and pi N --> eta N reaction. The initial and final pp distortions are calculated from a coupled-channel pi-NN model which describes the NN scattering data up to about 2 GeV. With the x-NN vertex functions taken from the Bonn potential, the predicted total cross sections of threshold pp --> eta pp reaction are in good agreement with the data. In contrast to previous works, we find that the eta-exchange plays an important role. The effect of the two-pion exchange, simulated by sigma- exchange, is found to be significant but not as dominant as the vector meson-exchange introduced in previous works.
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"abstract": "The total cross section for the near threshold eta production in\nproton-proton collisions has been investigated with the assumption that the\nproduction mechanism is due to the emission of a meson x (pi, eta, sigma) from\none of the nucleons followed by a x N --\u003e eta N transition on the second one.\nThe x N --\u003e eta N amplitudes are generated from the unitary multi-channel\nmulti-resonance model which has recently been constructed in analyzing the pi N\nscattering and pi N --\u003e eta N reaction. The initial and final pp distortions\nare calculated from a coupled-channel pi-NN model which describes the NN\nscattering data up to about 2 GeV. With the x-NN vertex functions taken from\nthe Bonn potential, the predicted total cross sections of threshold pp --\u003e eta\npp reaction are in good agreement with the data. In contrast to previous works,\nwe find that the eta-exchange plays an important role. The effect of the\ntwo-pion exchange, simulated by sigma- exchange, is found to be significant but\nnot as dominant as the vector meson-exchange introduced in previous works.",
"arxiv_id": "nucl-th/9604043",
"authors": [
"M. Batinic",
"A. Svarc",
"T. -S. H. Lee"
],
"categories": [
"nucl-th"
],
"doi": "10.1088/0031-8949/56/4/001",
"journal_ref": "Phys.Scripta 56 (1997) 321-324",
"title": "Near threshold eta production in proton-proton collisions",
"url": "https://arxiv.org/abs/nucl-th/9604043"
},
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