EPJ Web of Conferences (Jan 2020)
Non-strange dibaryons studied in coherent double neutral-meson photoproduction on the deuteron
- Ishikawa Takatsugu,
- Fujimura Hisako,
- Fukasawa Hiroshi,
- Hashimoto Ryo,
- He Qinghua,
- Honda Yuki,
- Iwata Takahiro,
- Kaida Shun,
- Kanda Hiroki,
- Kasagi Jirohta,
- Kawano Atsushi,
- Kuwasaki Shuzo,
- Maeda Kazushige,
- Masumoto Shin’ichi,
- Miyabe Manabu,
- Miyahara Fusashi,
- Mochizuki Keiichi,
- Muramatsu Norihito,
- Nakamura Akihiko,
- Nawa Ken’ichi,
- Ogushi Shoei,
- Okada Yasuyuki,
- Okamura Ken’yu,
- Onodera Yoshihito,
- Ozawa Kyoichiro,
- Sakamoto Yasunobu,
- Shimizu Hajime,
- Sugai Hiroyuki,
- Suzuki Koutaku,
- Tajima Yasuhisa,
- Takahashi Shin’ichiro,
- Taniguchi Yusuke,
- Tsuchikawa Yusuke,
- Yamazaki Hirohito,
- Yamazaki Ryuji,
- Yoshida Hiroshi
Affiliations
- Ishikawa Takatsugu
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Fujimura Hisako
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Fukasawa Hiroshi
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Hashimoto Ryo
- Research Center for Electron Photon Science (ELPH), Tohoku University
- He Qinghua
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Honda Yuki
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Iwata Takahiro
- Department of Physics, Yamagata University
- Kaida Shun
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Kanda Hiroki
- Department of Physics, Tohoku University
- Kasagi Jirohta
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Kawano Atsushi
- Department of Information Science, Tohoku Gakuin University
- Kuwasaki Shuzo
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Maeda Kazushige
- Department of Physics, Tohoku University
- Masumoto Shin’ichi
- Department of Physics, University of Tokyo
- Miyabe Manabu
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Miyahara Fusashi
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Mochizuki Keiichi
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Muramatsu Norihito
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Nakamura Akihiko
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Nawa Ken’ichi
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Ogushi Shoei
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Okada Yasuyuki
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Okamura Ken’yu
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Onodera Yoshihito
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Ozawa Kyoichiro
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK)
- Sakamoto Yasunobu
- Department of Information Science, Tohoku Gakuin University
- Shimizu Hajime
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Sugai Hiroyuki
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Suzuki Koutaku
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Tajima Yasuhisa
- Department of Physics, Yamagata University
- Takahashi Shin’ichiro
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Taniguchi Yusuke
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Tsuchikawa Yusuke
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Yamazaki Hirohito
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Yamazaki Ryuji
- Research Center for Electron Photon Science (ELPH), Tohoku University
- Yoshida Hiroshi
- Department of Physics, Yamagata University
- DOI
- https://doi.org/10.1051/epjconf/202024101007
- Journal volume & issue
-
Vol. 241
p. 01007
Abstract
The B = 2 bound/resonance state (dibaryon) is an interesting object, which can be a molecule consisting of two baryons or a spatially compact hexaquark hadron object. The yd ^ n°n°d reaction has been experimentally investigated at incident energies ranging from 0.58 to 1.15 GeV to study non-strange dibaryons. The angular distributions of deuteron emission in the yd center-of-mass energy cannot be reproduced by quasi-free production of two neutral pions followed by deuteron coalescence. Additionally a 2.14-GeV peak is observed in the n°d invariant mass distribution. These suggest a sequential process such as yd ^ RIS ^ n°RIV ^ n°n°d with an isoscalar dibaryon RIS and an isovector dibaryon RIV. Since the mass of the observed isoscalar dibaryons are close to the sum of the nucleon (N) and nucleon resonance (N*) masses, an S-wave NN* molecule may play a role as a doorway to a dibaryon.
