Evidence for a narrow S = +1 baryon resonance in photoproduction from the neutron -: art. no. 012002

被引：1019

作者：

Nakano, T ^{[1
]}

Ahn, DS

Ahn, JK

Akimune, H

Asano, Y

Chang, WC

Daté, S

Ejiri, H

Fujimura, H

Fujiwara, M

Hicks, K

Hotta, T

Imai, K

Ishikawa, T

Iwata, T

Kawai, H

Kim, ZY

Kino, K

Kohri, H

Kumagai, N

Makino, S

Matsumura, T

Matsuoka, N

Mibe, T

Miwa, K

Miyabe, M

Miyachi, Y

Morita, M

Muramatsu, N

Niiyama, M

Nomachi, M

Ohashi, Y

Ooba, T

Ohkuma, H

Oshuev, DS

Rangacharyulu, C

Sakaguchi, A

Sasaki, T

Shagin, PM

Shiino, Y

Shimizu, H

Sugaya, Y

Sumihama, M

Toyokawa, H

Wakai, A

Wang, CW

Wang, SC

Yonehara, K

Yorita, T

Yoshimura, M

机构：

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

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

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

[4] Japan Atom Energy Res Inst, Synchrotron Radiat Res Ctr, Mikazuki, Hyogo 6795198, Japan

[5] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

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

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

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

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

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

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

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

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

[14] Wakayama Med Univ, Wakayama 6418509, Japan

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

[16] Osaka Univ, Dept Phys, Osaka 5600043, Japan

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

[18] Nagoya Univ, Ctr Integrated Res Sci & Engn, Aichi 4648603, Japan

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

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.91.012002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The gamman-->K(+)K(-)n reaction on C-12 has been studied by measuring both K+ and K- at forward angles. A sharp baryon resonance peak was observed at 1.54+/-0.01 GeV/c(2) with a width smaller than 25 MeV/c(2) and a Gaussian significance of 4.6sigma. The strangeness quantum number (S) of the baryon resonance is +1. It can be interpreted as a molecular meson-baryon resonance or alternatively as an exotic five-quark state (uudd (s) over bar) that decays into a K+ and a neutron. The resonance is consistent with the lowest member of an antidecuplet of baryons predicted by the chiral soliton model.

引用

页数：4

共 11 条

[1] Exotic anti-decuplet of baryons: prediction from chiral solitons [J].