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

被引：105

作者：

Niiyama, M. ^{[1
]}

Fujimura, H. ^{[1
,13
]}

Ahn, D. S. ^{[2
]}

Ahn, J. K. ^{[3
]}

Ajimura, S. ^{[2
]}

Bhang, H. C. ^{[4
]}

Chang, T. H. ^{[5
]}

Chang, W. C. ^{[6
]}

Chen, J. Y. ^{[7
]}

Date, S. ^{[8
]}

Fukui, S. ^{[9
]}

Funahashi, H. ^{[10
]}

Hicks, K. ^{[11
]}

Horie, K. ^{[12
]}

Hotta, T. ^{[2
]}

Imai, K. ^{[1
]}

Ishikawa, T. ^{[13
]}

Kato, Y. ^{[2
]}

Kino, K. ^{[2
]}

Kohri, H. ^{[2
]}

Makino, S. ^{[14
]}

Matsumura, T. ^{[15
]}

Mibe, T. ^{[16
]}

Miwa, K. ^{[17
]}

Miyabe, M. ^{[1
]}

Muramatsu, N. ^{[2
]}

Nakamura, M. ^{[14
]}

Nakano, T. ^{[2
]}

Nakatsugawa, Y. ^{[1
]}

Ohashi, Y. ^{[8
]}

Oshuev, D. S. ^{[6
]}

Parker, J. D. ^{[1
]}

Saito, N. ^{[16
]}

Sawada, T. ^{[2
]}

Sugaya, Y. ^{[12
]}

Sumihama, M. ^{[2
]}

Tang, J. L. ^{[18
]}

Uchida, M. ^{[19
]}

Wang, C. W. ^{[6
]}

Yorita, T. ^{[2
]}

Yosoi, M. ^{[2
]}

机构：

[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[2] Osaka Univ, Res Ctr Nucl Phys, Ibaraki 5670047, Japan

[3] Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea

[4] Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea

[5] Ling Tung Univ, Dept Informat Management, Taichung, Taiwan

[6] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[7] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan

[8] Japan Synchrotron Radiat Res Inst, Mikazuki, Hyogo 6795198, Japan

[9] Nagoya Univ, Dept Phys & Astrophys, Nagoya, Aichi 4648602, Japan

[10] Osaka Electrocommun Univ, Osaka 5728530, Japan

[11] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[12] Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan

[13] Tohoku Univ, Nucl Sci Lab, Sendai, Miyagi 9820826, Japan

[14] Wakayama Med Univ, Wakayama 6418509, Japan

[15] Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan

[16] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[17] Tohoku Univ, Dept Phys, Sendai, Miyagi 9800861, Japan

[18] Natl Chung Cheng Univ, Dept Phys, Chiayi, Taiwan

[19] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan

来源：

PHYSICAL REVIEW C | 2008年 / 78卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.78.035202

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Differential cross sections for gamma p -> K+ Lambda (1405) and gamma p -> K+ Sigma(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+ 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(+) pi(-) and Sigma(-) pi(+) 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(0) (1385) production were measured in two photon energy ranges: near the production threshold (1.5 < E-gamma < 2.0 GeV) and far from it ( 2.0 < E. < 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.

引用

页数：10

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