Search for the K-pp bound state via γd → K+π-X reaction at Eγ=1.5-2.4 GeV

被引：62

作者：

Tokiyasu, A. O. ^{[1
]}

Niiyama, M. ^{[2
]}

Parker, J. D. ^{[2
]}

Ahn, D. S. ^{[1
]}

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

Ajimura, S. ^{[1
]}

Akimune, H. ^{[4
]}

Asano, Y. ^{[5
]}

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

Chen, J. Y. ^{[1
]}

Date, S. ^{[7
]}

Ejiri, H. ^{[1
]}

Fujimura, H. ^{[31
]}

Fujiwara, M. ^{[1
,9
]}

Fukui, S. ^{[10
]}

Hasegawa, S. ^{[1
]}

Hicks, K. ^{[11
]}

Horie, K. ^{[1
]}

Hotta, T. ^{[1
]}

Hwang, S. H. ^{[12
]}

Imai, K. ^{[12
]}

Ishikawa, T. ^{[8
]}

Iwata, T. ^{[13
]}

Kato, Y. ^{[14
]}

Kawai, H. ^{[15
]}

Kino, K. ^{[1
]}

Kohri, H. ^{[1
]}

Kon, Y. ^{[1
]}

Kumagai, N. ^{[7
]}

Lin, D. L. ^{[6
]}

Maeda, Y. ^{[1
]}

Makino, S. ^{[16
]}

Matsuda, T. ^{[17
]}

Matsumura, T. ^{[18
]}

Matsuoka, N. ^{[1
]}

Mibe, T. ^{[1
]}

Miyabe, M. ^{[8
]}

Miyachi, M. ^{[19
]}

Muramatsu, N. ^{[8
]}

Murayama, R. ^{[20
]}

Nakano, T. ^{[1
]}

Nakatsugawa, Y. ^{[1
]}

Nomachi, M. ^{[20
]}

Ohashi, Y. ^{[7
]}

Ohkuma, H. ^{[7
]}

Ohta, T. ^{[1
]}

Ooba, T. ^{[15
]}

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

Rangacharyulu, C. ^{[21
]}

Ryu, S. Y. ^{[1
,3
]}

机构：

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

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

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

[4] Konan Univ, Dept Phys, Kobe, Hyogo 6588501, Japan

[5] RIKEN, XFEL Project Head Off, Sayo, Hyogo 6795148, Japan

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

[7] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795143, Japan

[8] Tohoku Univ, Res Ctr Elect Photon Sci, Sendai, Miyagi 9820826, Japan

[9] Japan Atom Energy Agcy, Adv Photon Res Ctr, Kizugawa, Kyoto 6190215, Japan

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

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

[12] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[13] Yamagata Univ, Dept Phys, Yamagata 9908560, Japan

[14] Nagoya Univ, Div Particle & Astrophys Sci, Chikusa Ku, Nagoya, Aichi 4646802, Japan

[15] Chiba Univ, Dept Phys, Chiba 2638522, Japan

[16] Wakayama Med Coll, Wakayama 6418509, Japan

[17] Miyazaki Univ, Dept Appl Phys, Miyazaki 8892192, Japan

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

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

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

[21] Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada

[22] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[23] Gifu Univ, Dept Educ, Gifu 5011193, Japan

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

[25] Akita Res Inst Brain & Blood Vessels, Akita 0100874, Japan

[26] Osaka Univ, Inst Prot Res, Suita, Osaka 5650871, Japan

[27] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[28] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA

[29] Joint Inst Nucl Res, RU-141980 Dubna, Russia

[30] Natl Chung Cheng Univ, Dept Phys, Taipei, Taiwan

[31] Wakayama Med Univ, Sch Med, Wakayama 6410011, Japan

来源：

PHYSICS LETTERS B | 2014年 / 728卷

基金：

日本学术振兴会; 美国国家科学基金会; 新加坡国家研究基金会;

关键词：

Antikaon-nucleon physics; Kaonic nuclei; Photo-production;

D O I：

10.1016/j.physletb.2013.12.039

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for the K- pp bound state (the lightest kaonic nucleus) has been performed using the gamma d > K+pi X- reaction at E-gamma= 1.5-2.4 GeV at LEPS/SPring-8. The differential cross section of the K+pi(-) photo-production off deuterium (d(2)sigma/d cos theta(lab)(K+)/d cos theta(lab)(pi-)) has been measured for the first time in this energy region. A peak structure was searched for in the inclusive missing mass spectrum. A statistically significant peak structure was not observed in the region from 2.22 to 2.36 GeV/c(2). The upper limits of the differential cross section of the K- pp bound state production were determined to be (0.17-0.55), (0.55-1.7) and (1.1-2.9) mu b at 95% confidence level with the assumed widths of 20 MeV, 60 MeV and 100 MeV. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved,

引用

页码：616 / 621

页数：6

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