dorsal/arxiv
View SchemaNear-threshold production of a0(980) mesons in the reaction pp -> d K^+ \bar{K}^0
| Authors | V. Yu. Grishina, L. A. Kondratyuk, M. Buescher, W. Cassing |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0402093 |
| URL | https://arxiv.org/abs/nucl-th/0402093 |
| DOI | 10.1140/epja/i2004-10004-2 |
| Journal | Eur.Phys.J. A21 (2004) 507-520 |
Abstract
Using an effective Lagrangian approach as well as the Quark-Gluon Strings Model we analyze near-threshold production of a0(980)-mesons in the reaction NN -> d K \bar{K} as well as the background of non-resonant K\bar{K}-pair production. We argue that the reaction pp -> d K^+ \bar{K}^0 at an energy release Q<=100 MeV is dominated by the intermediate production of the a0(980)-resonance. At larger energies the non-resonant K^+\bar{K}^0-pair production - where the kaons are produced in a relative P-wave - becomes important. Then effects of final-state interactions are evaluated in a unitarized scattering-length approach and found to be in the order of a 20% suppression close to threshold. Thus in present experiments at the Cooler Synchrotron COSY-J\"ulich for Q<=107 MeV the a_0^+ signal can reliably be separated from the non-resonant K^+\bar{K^0} background.
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"abstract": "Using an effective Lagrangian approach as well as the Quark-Gluon Strings\nModel we analyze near-threshold production of a0(980)-mesons in the reaction NN\n-\u003e d K \\bar{K} as well as the background of non-resonant K\\bar{K}-pair\nproduction. We argue that the reaction pp -\u003e d K^+ \\bar{K}^0 at an energy\nrelease Q\u003c=100 MeV is dominated by the intermediate production of the\na0(980)-resonance. At larger energies the non-resonant K^+\\bar{K}^0-pair\nproduction - where the kaons are produced in a relative P-wave - becomes\nimportant. Then effects of final-state interactions are evaluated in a\nunitarized scattering-length approach and found to be in the order of a 20%\nsuppression close to threshold. Thus in present experiments at the Cooler\nSynchrotron COSY-J\\\"ulich for Q\u003c=107 MeV the a_0^+ signal can reliably be\nseparated from the non-resonant K^+\\bar{K^0} background.",
"arxiv_id": "nucl-th/0402093",
"authors": [
"V. Yu. Grishina",
"L. A. Kondratyuk",
"M. Buescher",
"W. Cassing"
],
"categories": [
"nucl-th"
],
"doi": "10.1140/epja/i2004-10004-2",
"journal_ref": "Eur.Phys.J. A21 (2004) 507-520",
"title": "Near-threshold production of a0(980) mesons in the reaction pp -\u003e d K^+ \\bar{K}^0",
"url": "https://arxiv.org/abs/nucl-th/0402093"
},
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