Photoproduction of Lambda(1405) and Sigma0(1385) on the proton at E(gamma) = 1.5-2.4-GeV
Photoproduction of Lambda(1405) and Sigma0(1385) on the proton at E(gamma) = 1.5-2.4-GeV
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DOI：
10.1103/physrevc.78.035202
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发表时间：
2008-05
影响因子：
3.1
通讯作者：
M. Niiyama;H. Fujimura;H. Fujimura;D. S. Ahn;J. K. Ahn;S. Ajimura;H. Bhang;T. Chang;We-Fu Chang;J. Chen;S. Dat'e;S. Fukui;H. Funahashi;K. Hicks;K. Horie;T. Hotta;K. Imai;T. Ishikawa;Y. Kato;K. Kino;H. Kohri;S. Makino;T. Matsumura;T. Mibe;K. Miwa;M. Miyabe;N. Muramatsu;M. Nakamura;T. Nakano;Y. Nakatsugawa;Y. Ohashi;D. Oshuev;J. Parker;N. Saito;T. Sawada;Y. Sugaya;M. Sumihama;Jaw-Luen Tang;M. Uchida;C. Wang;T. Yorita;M. Yosoi
中科院分区：
文献类型：
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作者：
M. Niiyama;H. Fujimura;H. Fujimura;D. S. Ahn;J. K. Ahn;S. Ajimura;H. Bhang;T. Chang;We-Fu Chang;J. Chen;S. Dat'e;S. Fukui;H. Funahashi;K. Hicks;K. Horie;T. Hotta;K. Imai;T. Ishikawa;Y. Kato;K. Kino;H. Kohri;S. Makino;T. Matsumura;T. Mibe;K. Miwa;M. Miyabe;N. Muramatsu;M. Nakamura;T. Nakano;Y. Nakatsugawa;Y. Ohashi;D. Oshuev;J. Parker;N. Saito;T. Sawada;Y. Sugaya;M. Sumihama;Jaw-Luen Tang;M. Uchida;C. Wang;T. Yorita;M. Yosoi
Differential cross sections for {gamma}p{yields}K{sup +}{lambda}(1405) and {gamma}p{yields}K{sup +}{sigma}{sup 0}(1385) reactions have been measured in the photon energy range from 1.5 to 2.4 GeV and the angular range of 0.8<cos({theta})<1.0 for the K{sup +} scattering angle in the center-of-mass system. This data is the first measurement of the {lambda}(1405) photoproduction cross section. The line shapes of {lambda}(1405) measured in {sigma}{sup +}{pi}{sup -} and {sigma}{sup -}{pi}{sup +} decay modes were different with each other, indicating a strong interference of the isospin 0 and 1 terms of the {sigma}{pi} scattering amplitudes. The ratios of {lambda}(1405) production to {sigma}{sup 0}(1385) production were measured in two photon energy ranges: near the production threshold (1.5<E{sub {gamma}}<2.0 GeV) and far from it (2.0<E{sub {gamma}}<2.4 GeV). The observed ratio decreased in the higher photon energy region, which may suggest different production mechanisms and internal structures for these hyperon resonances.
Differential cross sections for {gamma}p{yields}K{sup +}{lambda}(1405) and {gamma}p{yields}K{sup +}{sigma}{sup 0}(1385) reactions have been measured in the photon energy range from 1.5 to 2.4 GeV and the angular range of 0.8<cos({theta})<1.0 for the K{sup +} scattering angle in the center-of-mass system. This data is the first measurement of the {lambda}(1405) photoproduction cross section. The line shapes of {lambda}(1405) measured in {sigma}{sup +}{pi}{sup -} and {sigma}{sup -}{pi}{sup +} decay modes were different with each other, indicating a strong interference of the isospin 0 and 1 terms of the {sigma}{pi} scattering amplitudes. The ratios of {lambda}(1405) production to {sigma}{sup 0}(1385) production were measured in two photon energy ranges: near the production threshold (1.5<E{sub {gamma}}<2.0 GeV) and far from it (2.0<E{sub {gamma}}<2.4 GeV). The observed ratio decreased in the higher photon energy region, which may suggest different production mechanisms and internal structures for these hyperon resonances.