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. HwangK. 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

研究成果: 雜誌貢獻期刊論文同行評審

68 引文 斯高帕斯(Scopus)

摘要

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.

原文???core.languages.en_GB???
頁(從 - 到)616-621
頁數6
期刊Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
728
DOIs
出版狀態已出版 - 2014

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