dorsal/arxiv
View SchemaAnalysis of Theta^+ production in K^+Xe collisions
| Authors | A. Sibirtsev, J. Haidenbauer, S. Krewald, Ulf-G. Meißner |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0407011 |
| URL | https://arxiv.org/abs/nucl-th/0407011 |
| DOI | 10.1140/epja/i2004-10094-8 |
| Journal | Eur.Phys.J. A23 (2005) 491-499 |
Abstract
The reaction K^+Xe->K^0pX is investigated in a meson-exchange model including rescattering of the secondary protons with the aim to analyze the evidence for the Theta^+(1540) resonance reported by the DIANA collaboration. We confirm that the kinematical cuts introduced by the DIANA collaboration efficiently suppress the background to the K^+n->K^0p reaction which may contribute to the Theta^+(1540) production. We find that these kinematical cuts do not produce a narrow structure in the K^0p effective mass spectra near 1540 MeV. We study the effect of a narrow Theta^+ resonance of both positive and negative parity in comparison with the DIANA data. We show that the K^+Xe->K^0pX calculations without Theta^+ contribution as well as the results obtained with a Theta^+ width of 1 MeV are in comparably good agreement with the DIANA results. More dedicated experiments are called for to establish this exotic baryon resonance.
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"abstract": "The reaction K^+Xe-\u003eK^0pX is investigated in a meson-exchange model including\nrescattering of the secondary protons with the aim to analyze the evidence for\nthe Theta^+(1540) resonance reported by the DIANA collaboration. We confirm\nthat the kinematical cuts introduced by the DIANA collaboration efficiently\nsuppress the background to the K^+n-\u003eK^0p reaction which may contribute to the\nTheta^+(1540) production. We find that these kinematical cuts do not produce a\nnarrow structure in the K^0p effective mass spectra near 1540 MeV. We study the\neffect of a narrow Theta^+ resonance of both positive and negative parity in\ncomparison with the DIANA data. We show that the K^+Xe-\u003eK^0pX calculations\nwithout Theta^+ contribution as well as the results obtained with a Theta^+\nwidth of 1 MeV are in comparably good agreement with the DIANA results. More\ndedicated experiments are called for to establish this exotic baryon resonance.",
"arxiv_id": "nucl-th/0407011",
"authors": [
"A. Sibirtsev",
"J. Haidenbauer",
"S. Krewald",
"Ulf-G. Mei\u00dfner"
],
"categories": [
"nucl-th",
"hep-ex",
"hep-ph",
"nucl-ex"
],
"doi": "10.1140/epja/i2004-10094-8",
"journal_ref": "Eur.Phys.J. A23 (2005) 491-499",
"title": "Analysis of Theta^+ production in K^+Xe collisions",
"url": "https://arxiv.org/abs/nucl-th/0407011"
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