dorsal/arxiv
View SchemaCoherent Theta^+ and Lambda(1520) photoproduction off the deuteron
| Authors | A. I. Titov, B. Kampfer, S. Daté, Y. Ohashi |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0506072 |
| URL | https://arxiv.org/abs/nucl-th/0506072 |
| DOI | 10.1103/PhysRevC.72.035206 10.1103/PhysRevC.72.049901 |
| Journal | Phys.Rev.C72:035206,2005; Erratum-ibid.C72:049901,2005 |
Abstract
We analyze an effect of the coherent $\Theta^+\Lambda(1520)$ photoproduction in $\gamma D$ interaction near the threshold. We demonstrate that the coherence effect becomes manifest in a comparison of the $nK^+$ invariant mass distribution when the $pK^-$ invariant equals the $\Lambda(1520)$ mass. Our model calculations indicate a sizeable contribution of resonant and non-resonant background processes in the $\gamma D\to np K^+K^-$ reaction which generally exceed the contribution of the coherent resonant channel. However, we find that the coherent $\Theta^+\Lambda(1520)$ photoproduction is enhanced relative to the background processes in the forward hemisphere of the $pK^-$ pair photoproduction. Moreover, the coherence effect does not depend on the $\Theta^+$ photoproduction amplitude and is defined by the probabilities of the $\Lambda(1520)$ photoproduction and the $\Theta^+\to NK$ transition. Therefore, this coherence effect may be used as an independent method for studying the mechanism of $\Theta^+$ production and $\Theta^+$ properties.
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"abstract": "We analyze an effect of the coherent $\\Theta^+\\Lambda(1520)$ photoproduction\nin $\\gamma D$ interaction near the threshold. We demonstrate that the coherence\neffect becomes manifest in a comparison of the $nK^+$ invariant mass\ndistribution when the $pK^-$ invariant equals the $\\Lambda(1520)$ mass. Our\nmodel calculations indicate a sizeable contribution of resonant and\nnon-resonant background processes in the $\\gamma D\\to np K^+K^-$ reaction which\ngenerally exceed the contribution of the coherent resonant channel. However, we\nfind that the coherent $\\Theta^+\\Lambda(1520)$ photoproduction is enhanced\nrelative to the background processes in the forward hemisphere of the $pK^-$\npair photoproduction. Moreover, the coherence effect does not depend on the\n$\\Theta^+$ photoproduction amplitude and is defined by the probabilities of the\n$\\Lambda(1520)$ photoproduction and the $\\Theta^+\\to NK$ transition. Therefore,\nthis coherence effect may be used as an independent method for studying the\nmechanism of $\\Theta^+$ production and $\\Theta^+$ properties.",
"arxiv_id": "nucl-th/0506072",
"authors": [
"A. I. Titov",
"B. Kampfer",
"S. Dat\u00e9",
"Y. Ohashi"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.72.035206 10.1103/PhysRevC.72.049901",
"journal_ref": "Phys.Rev.C72:035206,2005; Erratum-ibid.C72:049901,2005",
"title": "Coherent Theta^+ and Lambda(1520) photoproduction off the deuteron",
"url": "https://arxiv.org/abs/nucl-th/0506072"
},
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