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Main Authors: Muramatsu, N., Ahn, J. K., Chang, W. C., Chen, J. Y., Chu, M. L., Daté, S., Gogami, T., Hamano, H., Hashimoto, T., He, Q. H., Hicks, K., Hiraiwa, T., Honda, Y., Hotta, T., Inoue, Y., Ishikawa, T., Jaegle, I., Kasamatsu, Y., Kashevarov, V. L., Katsuragawa, H., Kido, S., Kobayakawa, R., Kon, Y., Masumoto, S., Matsumura, Y., Miyabe, M., Mizutani, K., Mo, T. Z., Nakamura, T., Nakano, T., Nam, T., Niiyama, M., Nikonov, K. V., Nozawa, Y., Ohashi, Y., Ohnishi, H., Ohta, T., Okabe, M., Ozawa, K., Rangacharyulu, C., Ryu, S. Y., Sada, Y., Sarantsev, A. V., Shibukawa, T., Shimizu, H., Shirai, R., Shiraishi, K., Strokovsky, E. A., Sugaya, Y., Sumihama, M., Suzuki, S., Tanaka, S., Taniguchi, Y., Tokiyasu, A., Tomida, N., Tsuchikawa, Y., Ueda, T., Wang, T. F., Yamazaki, H., Yamazaki, R., Yanai, Y., Yorita, T., Yoshida, C., Yosoi, M.
Format: Preprint
Published: 2026
Subjects:
Nuclear Experiment
High Energy Physics - Experiment
Online Access:https://arxiv.org/abs/2602.18675
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Table of Contents:
  • For the spectroscopy of nucleon resonances at the total energies from the $η^\prime$-meson production threshold to $2.32$ $\mathrm{GeV}$, photon beam asymmetries of the reaction $γp \to η^\prime p$ were measured together with total and differential cross sections by analyzing the two decay modes $η^\prime \to γγ$ and $π^0 π^0 η$. New constraints for amplitude decomposition were given by the first-time result of photon beam asymmetries at $E_γ> 1.84$ $\mathrm{GeV}$ and the most precise data of differential cross sections to date at extremely backward $η^\prime$ angles. The possibility of a larger coupling constant of the $η^\prime$-nucleon system to the $N(2250)$ resonance was implied in the partial wave analyses using the present data.

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