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Search for eta' Bound Nuclei in the C-12(gamma,p) Reaction with Simultaneous Detection of Decay Products
- Authors
- Tomida, N.; Muramatsu, N.; Niiyama, M.; Ahn, J. K.; Chang, W. C.; Chen, J. Y.; Chu, M. L.; Date, S.; Gogami, T.; Goto, H.; Hamano, H.; Hashimoto, T.; He, Q. H.; Hicks, K.; Hiraiwa, T.; Honda, Y.; Hotta, T.; Ikuno, H.; Inoue, Y.; Ishikawa, T.; Jaegle, I.; Jo, J. M.; Kasamatsu, Y.; Katsuragawa, H.; Kido, S.; Kon, Y.; Maruyama, T.; Masumoto, S.; Matsumura, Y.; Miyabe, M.; Mizutani, K.; Nagahiro, H.; Nakamura, T.; Nakano, T.; Nam, T.; Ngan, T. N. T.; Nozawa, Y.; Ohashi, Y.; Ohnishi, H.; Ohta, T.; Ozawa, K.; Rangacharyulu, C.; Ryu, S. Y.; Sada, Y.; Sasagawa, M.; Shibukawa, T.; Shimizu, H.; Shirai, R.; Shiraishi, K.; Strokovsky, E. A.; Sugaya, Y.; Sumihama, M.; Suzuki, S.; Tanaka, S.; Tokiyasu, A.; Tsuchikawa, Y.; Ueda, T.; Yamazaki, H.; Yamazaki, R.; Yanai, Y.; Yorita, T.; Yoshida, C.; Yosoi, M.
- Issue Date
- 20-May-2020
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.124, no.20
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 124
- Number
- 20
- ISSN
- 0031-9007
- Abstract
- We measured missing mass spectrum of the C-12(gamma, p) reaction for the first time in coincidence with potential decay products from q' bound nuclei. We tagged an (eta + p) pair associated with the eta'N -> eta N process in a nucleus. After applying kinematical selections to reduce backgrounds, no signal events were observed in the bound-state region. An upper limit of the signal cross section in the opening angle theta(eta 9)(lab) < -0.9 was obtained to be 2.2 nb/sr at the 90% confidence level. It is compared with theoretical cross sections, whose normalization ambiguity is suppressed by measuring a quasifree eta' production rate. Our results indicate a small branching fraction of the eta'N -> eta N process and/or a shallow eta'-nucleus potential.
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Related Researcher
- Ahn, Jung Keun
- College of Science (Department of Physics)