@article{50f83e42280c46168cec28da2f502e06,
title = "Search for η′ Bound Nuclei in the C 12 (γ,p) Reaction with Simultaneous Detection of Decay Products",
abstract = "We measured missing mass spectrum of the C12(γ,p) reaction for the first time in coincidence with potential decay products from η′ bound nuclei. We tagged an (η+p) pair associated with the η′N→ηN 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 cosθlabηp<-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 η′ production rate. Our results indicate a small branching fraction of the η′N→ηN process and/or a shallow η′-nucleus potential.",
author = "{(LEPS2/BGOegg Collaboration)} and M. Yosoi and N. Tomida and N. Muramatsu and M. Niiyama and Ahn, {J. K.} and Chang, {W. C.} and Chen, {J. Y.} and Chu, {M. L.} and S. Dat{\'e} and T. Gogami and H. Goto and H. Hamano and T. Hashimoto and He, {Q. H.} and K. Hicks and T. Hiraiwa and Y. Honda and T. Hotta and H. Ikuno and Y. Inoue and T. Ishikawa and I. Jaegle and Jo, {J. M.} and Y. Kasamatsu and H. Katsuragawa and S. Kido and Y. Kon and T. Maruyama and S. Masumoto and Y. Matsumura and M. Miyabe and K. Mizutani and H. Nagahiro and T. Nakamura and T. Nakano and T. Nam and Ngan, {T. N.T.} and Y. Nozawa and Y. Ohashi and H. Ohnishi and T. Ohta and K. Ozawa and C. Rangacharyulu and Ryu, {S. Y.} and Y. Sada and M. Sasagawa and T. Shibukawa and H. Shimizu and R. Shirai and K. Shiraishi",
note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2020",
month = may,
day = "22",
doi = "10.1103/PhysRevLett.124.202501",
language = "English",
volume = "124",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "20",
}