Photoproduction of Λ(1405) and Σ0(1385) on the proton at Eγ=1.5-2.4 GeV

M. Niiyama, H. Fujimura, D. S. Ahn, J. K. Ahn, S. Ajimura, H. C. Bhang, T. H. Chang, W. C. Chang, J. Y. Chen, S. Daté, S. Fukui, H. Funahashi, K. Hicks, K. Horie, T. Hotta, K. Imai, T. Ishikawa, Y. Kato, K. Kino, H. KohriS. Makino, T. Matsumura, T. Mibe, K. Miwa, M. Miyabe, N. Muramatsu, M. Nakamura, T. Nakano, Y. Nakatsugawa, Y. Ohashi, D. S. Oshuev, J. D. Parker, N. Saito, T. Sawada, Y. Sugaya, M. Sumihama, J. L. Tang, M. Uchida, C. W. Wang, T. Yorita, M. Yosoi

研究成果: Article査読

104 被引用数 (Scopus)


Differential cross sections for γp→K+Λ(1405) and γp→K+Σ0(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(Θ)<1.0 for the K+ scattering angle in the center-of-mass system. This data is the first measurement of the Λ(1405) photoproduction cross section. The line shapes of Λ(1405) measured in Σ+π- and Σ-π+ decay modes were different with each other, indicating a strong interference of the isospin 0 and 1 terms of the Σπ scattering amplitudes. The ratios of Λ(1405) production to Σ0(1385) production were measured in two photon energy ranges: near the production threshold (1.5<Eγ<2.0 GeV) and far from it (2.0<Eγ<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.

ジャーナルPhysical Review C - Nuclear Physics
出版ステータスPublished - 2008 9月 9

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学


「Photoproduction of Λ(1405) and Σ0(1385) on the proton at Eγ=1.5-2.4 GeV」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。