dorsal/arxiv
View SchemaKaon photoproduction in a multipole approach
| Authors | T. Mart, A. Sulaksono |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0609077 |
| URL | https://arxiv.org/abs/nucl-th/0609077 |
| DOI | 10.1103/PhysRevC.74.055203 |
| Journal | Phys.Rev.C74:055203,2006 |
Abstract
The recently published experimental data on K+Lambda photoproduction by the SAPHIR, CLAS, and LEPS collaborations are analyzed by means of a multipole approach. For this purpose the background amplitudes are constructed from appropriate Feynman diagrams in a gauge-invariant and crossing-symmetric fashion. The results of our calculation emphasize the lack of mutual consistency between the SAPHIR and CLAS data previously found by several independent research groups, whereas the LEPS data are found to be more consistent with those of CLAS. The use of SAPHIR and CLAS data, individually or simultaneously, leads to quite different resonance parameters which, therefore, could lead to different conclusions on ``missing resonances''. Fitting to the SAPHIR and LEPS data simultaneously indicates that the S_{11}(1650), P_{13}(1720), D_{13}(1700), D_{13}(2080), F_{15}(1680), and F_{15}(2000) resonances are required, while fitting to the combination of CLAS and LEPS data leads alternatively to the P_{13}(1900), D_{13}(2080), D_{15}(1675), F_{15}(1680), and F_{17}(1990) resonances. Although yielding different results in most cases, both SAPHIR and CLAS data indicate that the second peak in the cross sections at W = 1900 MeV originates from the D_{13}(2080) resonance with a mass between 1911 - 1936 MeV. Furthermore, in contrast to the results of currently available models and the Table of Particle Properties, both data sets do not exhibit the need for a P_{11}(1710) resonance. The few data points available for target asymmetry can not be described by the models proposed in the present work.
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"abstract": "The recently published experimental data on K+Lambda photoproduction by the\nSAPHIR, CLAS, and LEPS collaborations are analyzed by means of a multipole\napproach. For this purpose the background amplitudes are constructed from\nappropriate Feynman diagrams in a gauge-invariant and crossing-symmetric\nfashion. The results of our calculation emphasize the lack of mutual\nconsistency between the SAPHIR and CLAS data previously found by several\nindependent research groups, whereas the LEPS data are found to be more\nconsistent with those of CLAS. The use of SAPHIR and CLAS data, individually or\nsimultaneously, leads to quite different resonance parameters which, therefore,\ncould lead to different conclusions on ``missing resonances\u0027\u0027. Fitting to the\nSAPHIR and LEPS data simultaneously indicates that the S_{11}(1650),\nP_{13}(1720), D_{13}(1700), D_{13}(2080), F_{15}(1680), and F_{15}(2000)\nresonances are required, while fitting to the combination of CLAS and LEPS data\nleads alternatively to the P_{13}(1900), D_{13}(2080), D_{15}(1675),\nF_{15}(1680), and F_{17}(1990) resonances. Although yielding different results\nin most cases, both SAPHIR and CLAS data indicate that the second peak in the\ncross sections at W = 1900 MeV originates from the D_{13}(2080) resonance with\na mass between 1911 - 1936 MeV. Furthermore, in contrast to the results of\ncurrently available models and the Table of Particle Properties, both data sets\ndo not exhibit the need for a P_{11}(1710) resonance. The few data points\navailable for target asymmetry can not be described by the models proposed in\nthe present work.",
"arxiv_id": "nucl-th/0609077",
"authors": [
"T. Mart",
"A. Sulaksono"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.74.055203",
"journal_ref": "Phys.Rev.C74:055203,2006",
"title": "Kaon photoproduction in a multipole approach",
"url": "https://arxiv.org/abs/nucl-th/0609077"
},
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