Resonance-like structure near the ηd threshold in the γd→π0ηd reaction

T. Ishikawa, a H. Fujimura, b H. Fukasawa, R. Hashimoto, c Q. He, d Y. Honda, T. Iwata, S. Kaida, J. Kasagi, A. Kawano, S. Kuwasaki, K. Maeda, S. Masumoto, M. Miyabe, F. Miyahara, e K. Mochizuki, N. Muramatsu, A. Nakamura, K. Nawa, Y. Obara, S. Ogushi, Y. Okada, K. Okamura, Y. Onodera, K. Ozawa, Y. Sakamoto, M. Sato, H. Shimizu, H. Sugai, f K. Suzuki, g Y. Tajima, S. Takahashi, Y. Taniguchi, Y. Tsuchikawa, h H. Yamazaki, i R. Yamazaki, and H.Y. Yoshida Research Center for Electron Photon Science (ELPH), Tohoku University, Sendai 982-0826, Japan Department of Physics, Yamagata University, Yamagata 990-8560, Japan Department of Information Science, Tohoku Gakuin University, Sendai 981-3193, Japan Department of Physics, Tohoku University, Sendai 980-8578, Japan Department of Physics, University of Tokyo, Tokyo 113-0033, Japan Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan