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

A. O. Tokiyasu; M. Niiyama; J. D. Parker; D. S. Ahn; J. K. Ahn; S. Ajimura; H. Akimune; Y. Asano; W. C. Chang; J. Y. Chen; S. Daté; H. Ejiri; H. Fujimura; M. Fujiwara; S. Fukui; S. Hasegawa; K. Hicks; K. Horie; T. Hotta; S. H. Hwang; K. Imai; T. Ishikawa; T. Iwata; Y. Kato; H. Kawai; K. Kino; H. Kohri; Y. Kon; N. Kumagai; D. L. Lin; Y. Maeda; S. Makino; T. Matsuda; T. Matsumura; N. Matsuoka; T. Mibe; M. Miyabe; M. Miyachi; N. Muramatsu; R. Murayama; T. Nakano; Y. Nakatsugawa; M. Nomachi; Y. Ohashi; H. Ohkuma; T. Ohta; T. Ooba; D. S. Oshuev; C. Rangacharyulu; S. Y. Ryu; A. Sakaguchi; T. Sawada; P. M. Shagin; Y. Shiino; H. Shimizu; E. A. Strokovsky; Y. Sugaya; M. Sumihama; J. L. Tang; Y. Toi; H. Toyokawa; T. Tsunemi; M. Uchida; M. Ungaro; A. Wakai; C. W. Wang; S. C. Wang; K. Yonehara; T. Yorita; M. Yoshimura; M. Yosoi; R. G.T. Zegers

doi:10.1016/j.physletb.2013.12.039

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

A. O. Tokiyasu^*
, M. Niiyama
, J. D. Parker
, D. S. Ahn
, J. K. Ahn
, S. Ajimura
, H. Akimune
, Y. Asano
, W. C. Chang
, J. Y. Chen
, S. Daté
, H. Ejiri
, H. Fujimura
, M. Fujiwara
, S. Fukui
, S. Hasegawa
, K. Hicks
, K. Horie
, T. Hotta
, S. H. Hwang

K. Imai, T. Ishikawa, T. Iwata, Y. Kato, H. Kawai, K. Kino, H. Kohri, Y. Kon, N. Kumagai, D. L. Lin, Y. Maeda, S. Makino, T. Matsuda, T. Matsumura, N. Matsuoka, T. Mibe, M. Miyabe, M. Miyachi, N. Muramatsu, R. Murayama, T. Nakano, Y. Nakatsugawa, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ohta, T. Ooba, D. S. Oshuev, C. Rangacharyulu, S. Y. Ryu, A. Sakaguchi, T. Sawada, P. M. Shagin, Y. Shiino, H. Shimizu, E. A. Strokovsky, Y. Sugaya, M. Sumihama, J. L. Tang, Y. Toi, H. Toyokawa, T. Tsunemi, M. Uchida, M. Ungaro, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G.T. Zegers

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

72 Citations (Scopus)

Abstract

A search for the K^-pp bound state (the lightest kaonic nucleus) has been performed using the γd→K⁺π^-X reaction at E_γ = 1.5-2.4 GeV at LEPS/SPring-8. The differential cross section of the K⁺π^- photo-production off deuterium (d²σ/dcosθ^lab_K⁺/dcosθ^lab_π^-) 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/c². 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) μb at 95% confidence level with the assumed widths of 20 MeV, 60 MeV and 100 MeV.

Original language	English
Pages (from-to)	616-621
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	728
DOIs	https://doi.org/10.1016/j.physletb.2013.12.039
Publication status	Published - 2014
Externally published	Yes

Bibliographical note

Funding Information:
The authors thank the SPring-8 staff for their contributions in the operation of the LEPS experiment. This research was supported in part by the Ministry of Education, Science, Sports and Culture of Japan , by the GCOE program in Kyoto University , by the National Science Council of the Republic of China (Taiwan) , by the National Research Foundation of Korea ( 2012R1A2A1A01011926 ) and by the National Science Foundation (NSF Award PHY-0244999 ). Author J.D. Parker was supported by a Postdoctoral Fellowship for Foreign Researchers from the Japan Society for the Promotion of Science .

Keywords

Antikaon-nucleon physics
Kaonic nuclei
Photo-production

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2013.12.039

Cite this

Tokiyasu, A. O., Niiyama, M., Parker, J. D., Ahn, D. S., Ahn, J. K., Ajimura, S., Akimune, H., Asano, Y., Chang, W. C., Chen, J. Y., Daté, S., Ejiri, H., Fujimura, H., Fujiwara, M., Fukui, S., Hasegawa, S., Hicks, K., Horie, K., Hotta, T., ... Zegers, R. G. T. (2014). Search for the K^-pp bound state via γd→K⁺π^-X reaction at E_γ=1.5-2.4GeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 728, 616-621. https://doi.org/10.1016/j.physletb.2013.12.039

Tokiyasu, AO, Niiyama, M, Parker, JD, Ahn, DS, Ahn, JK, Ajimura, S, Akimune, H, Asano, Y, Chang, WC, Chen, JY, Daté, S, Ejiri, H, Fujimura, H, Fujiwara, M, Fukui, S, Hasegawa, S, Hicks, K, Horie, K, Hotta, T, Hwang, SH, Imai, K, Ishikawa, T, Iwata, T, Kato, Y, Kawai, H, Kino, K, Kohri, H, Kon, Y, Kumagai, N, Lin, DL, Maeda, Y, Makino, S, Matsuda, T, Matsumura, T, Matsuoka, N, Mibe, T, Miyabe, M, Miyachi, M, Muramatsu, N, Murayama, R, Nakano, T, Nakatsugawa, Y, Nomachi, M, Ohashi, Y, Ohkuma, H, Ohta, T, Ooba, T, Oshuev, DS, Rangacharyulu, C, Ryu, SY, Sakaguchi, A, Sawada, T, Shagin, PM, Shiino, Y, Shimizu, H, Strokovsky, EA, Sugaya, Y, Sumihama, M, Tang, JL, Toi, Y, Toyokawa, H, Tsunemi, T, Uchida, M, Ungaro, M, Wakai, A, Wang, CW, Wang, SC, Yonehara, K, Yorita, T, Yoshimura, M, Yosoi, M & Zegers, RGT 2014, 'Search for the K^-pp bound state via γd→K⁺π^-X reaction at E_γ=1.5-2.4GeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 728, pp. 616-621. https://doi.org/10.1016/j.physletb.2013.12.039

@article{7d222aadc98944469c92ebb4540cf1ac,

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

abstract = "A search for the K-pp bound state (the lightest kaonic nucleus) has been performed using the γd→K+π-X reaction at Eγ = 1.5-2.4 GeV at LEPS/SPring-8. The differential cross section of the K+π- photo-production off deuterium (d2σ/dcosθlabK+/dcosθlabπ-) 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/c2. 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) μb at 95\% confidence level with the assumed widths of 20 MeV, 60 MeV and 100 MeV.",

keywords = "Antikaon-nucleon physics, Kaonic nuclei, Photo-production",

author = "Tokiyasu, \{A. O.\} and M. Niiyama and Parker, \{J. D.\} and Ahn, \{D. S.\} and Ahn, \{J. K.\} and S. Ajimura and H. Akimune and Y. Asano and Chang, \{W. C.\} and Chen, \{J. Y.\} and S. Dat{\'e} and H. Ejiri and H. Fujimura and M. Fujiwara and S. Fukui and S. Hasegawa and K. Hicks and K. Horie and T. Hotta and Hwang, \{S. H.\} and K. Imai and T. Ishikawa and T. Iwata and Y. Kato and H. Kawai and K. Kino and H. Kohri and Y. Kon and N. Kumagai and Lin, \{D. L.\} and Y. Maeda and S. Makino and T. Matsuda and T. Matsumura and N. Matsuoka and T. Mibe and M. Miyabe and M. Miyachi and N. Muramatsu and R. Murayama and T. Nakano and Y. Nakatsugawa and M. Nomachi and Y. Ohashi and H. Ohkuma and T. Ohta and T. Ooba and Oshuev, \{D. S.\} and C. Rangacharyulu and Ryu, \{S. Y.\} and A. Sakaguchi and T. Sawada and Shagin, \{P. M.\} and Y. Shiino and H. Shimizu and Strokovsky, \{E. A.\} and Y. Sugaya and M. Sumihama and Tang, \{J. L.\} and Y. Toi and H. Toyokawa and T. Tsunemi and M. Uchida and M. Ungaro and A. Wakai and Wang, \{C. W.\} and Wang, \{S. C.\} and K. Yonehara and T. Yorita and M. Yoshimura and M. Yosoi and Zegers, \{R. G.T.\}",

note = "Funding Information: The authors thank the SPring-8 staff for their contributions in the operation of the LEPS experiment. This research was supported in part by the Ministry of Education, Science, Sports and Culture of Japan , by the GCOE program in Kyoto University , by the National Science Council of the Republic of China (Taiwan) , by the National Research Foundation of Korea ( 2012R1A2A1A01011926 ) and by the National Science Foundation (NSF Award PHY-0244999 ). Author J.D. Parker was supported by a Postdoctoral Fellowship for Foreign Researchers from the Japan Society for the Promotion of Science .",

year = "2014",

doi = "10.1016/j.physletb.2013.12.039",

language = "English",

volume = "728",

pages = "616--621",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Search for the K-pp bound state via γd→K+π-X reaction at Eγ=1.5-2.4GeV

AU - Tokiyasu, A. O.

AU - Niiyama, M.

AU - Parker, J. D.

AU - Ahn, D. S.

AU - Ahn, J. K.

AU - Ajimura, S.

AU - Akimune, H.

AU - Asano, Y.

AU - Chang, W. C.

AU - Chen, J. Y.

AU - Daté, S.

AU - Ejiri, H.

AU - Fujimura, H.

AU - Fujiwara, M.

AU - Fukui, S.

AU - Hasegawa, S.

AU - Hicks, K.

AU - Horie, K.

AU - Hotta, T.

AU - Hwang, S. H.

AU - Imai, K.

AU - Ishikawa, T.

AU - Iwata, T.

AU - Kato, Y.

AU - Kawai, H.

AU - Kino, K.

AU - Kohri, H.

AU - Kon, Y.

AU - Kumagai, N.

AU - Lin, D. L.

AU - Maeda, Y.

AU - Makino, S.

AU - Matsuda, T.

AU - Matsumura, T.

AU - Matsuoka, N.

AU - Mibe, T.

AU - Miyabe, M.

AU - Miyachi, M.

AU - Muramatsu, N.

AU - Murayama, R.

AU - Nakano, T.

AU - Nakatsugawa, Y.

AU - Nomachi, M.

AU - Ohashi, Y.

AU - Ohkuma, H.

AU - Ohta, T.

AU - Ooba, T.

AU - Oshuev, D. S.

AU - Rangacharyulu, C.

AU - Ryu, S. Y.

AU - Sakaguchi, A.

AU - Sawada, T.

AU - Shagin, P. M.

AU - Shiino, Y.

AU - Shimizu, H.

AU - Strokovsky, E. A.

AU - Sugaya, Y.

AU - Sumihama, M.

AU - Tang, J. L.

AU - Toi, Y.

AU - Toyokawa, H.

AU - Tsunemi, T.

AU - Uchida, M.

AU - Ungaro, M.

AU - Wakai, A.

AU - Wang, C. W.

AU - Wang, S. C.

AU - Yonehara, K.

AU - Yorita, T.

AU - Yoshimura, M.

AU - Yosoi, M.

AU - Zegers, R. G.T.

N1 - Funding Information: The authors thank the SPring-8 staff for their contributions in the operation of the LEPS experiment. This research was supported in part by the Ministry of Education, Science, Sports and Culture of Japan , by the GCOE program in Kyoto University , by the National Science Council of the Republic of China (Taiwan) , by the National Research Foundation of Korea ( 2012R1A2A1A01011926 ) and by the National Science Foundation (NSF Award PHY-0244999 ). Author J.D. Parker was supported by a Postdoctoral Fellowship for Foreign Researchers from the Japan Society for the Promotion of Science .

PY - 2014

Y1 - 2014

N2 - A search for the K-pp bound state (the lightest kaonic nucleus) has been performed using the γd→K+π-X reaction at Eγ = 1.5-2.4 GeV at LEPS/SPring-8. The differential cross section of the K+π- photo-production off deuterium (d2σ/dcosθlabK+/dcosθlabπ-) 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/c2. 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) μb at 95% confidence level with the assumed widths of 20 MeV, 60 MeV and 100 MeV.

AB - A search for the K-pp bound state (the lightest kaonic nucleus) has been performed using the γd→K+π-X reaction at Eγ = 1.5-2.4 GeV at LEPS/SPring-8. The differential cross section of the K+π- photo-production off deuterium (d2σ/dcosθlabK+/dcosθlabπ-) 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/c2. 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) μb at 95% confidence level with the assumed widths of 20 MeV, 60 MeV and 100 MeV.

KW - Antikaon-nucleon physics

KW - Kaonic nuclei

KW - Photo-production

UR - https://www.scopus.com/pages/publications/84903470908

U2 - 10.1016/j.physletb.2013.12.039

DO - 10.1016/j.physletb.2013.12.039

M3 - Article

AN - SCOPUS:84903470908

SN - 0370-2693

VL - 728

SP - 616

EP - 621

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -