TY - JOUR
T1 - Study of non-strange dibaryon resonances via coherent double neutral-pion photoproduction on the deuteron
AU - for the FOREST collaboration
AU - Ishikawa, Takatsugu
AU - Fujimura, Hisako
AU - Hashimoto, Ryo
AU - He, Qinghua
AU - Kaida, Shun
AU - Miyabe, Manabu
AU - Muramatsu, Norihito
AU - Shimizu, Hajime
AU - Suzuki, Koutaku
AU - Tschikawa, Yusuke
AU - Yamazaki, Hirohito
AU - Masumoto, Shin'ichi
AU - Kanda, Hiroki
AU - Maeda, Kazushige
AU - Ozawa, Kyoichiro
N1 - Funding Information:
The authors would like to thank the accelerator staff at ELPH for their support during the FOREST experiment. This work was supported in part by JSPS KAKENHI Grants Nos. 17340063, 19002003, 24244022, 26400287, and 16H02188.
Publisher Copyright:
© Copyright owned by the author(s).
PY - 2017
Y1 - 2017
N2 - The cross sections was measured for coherent double neutral-pion photoproduction on the deuteron using the tagged photon beams from the 0.9 and 1.2 GeV primary electron beams at the Research Center for Electron Photon Science, Tohoku University, Japan. The four-momenta of the four photons from the two π0 decays and deuteron are measured with the FOREST detector, and the γd → π0π0d reaction was identified using 6-constraint kinematic fit (energy and three-momentum conservation, and two π0 masses). The total cross section is found to be 18.4±9.2 nb for the d∗(2380) dibaryon resonance at Wγ d = 2.37 GeV, which is a candidate of the isoscalar ∆∆ quasi-bound state D03, in the γd → π0π0d reaction. The measured excitation function is consistent with the existing theoretical calculation for this reaction. At high incident energies, π0d invariant-mass distributions show a peak at approximately 2.15 GeV, which can be attributed to a N∆ quasi-bound state D12. In this contribution, the properties (mass, width, and decay angular distribution) of this peak is presented.
AB - The cross sections was measured for coherent double neutral-pion photoproduction on the deuteron using the tagged photon beams from the 0.9 and 1.2 GeV primary electron beams at the Research Center for Electron Photon Science, Tohoku University, Japan. The four-momenta of the four photons from the two π0 decays and deuteron are measured with the FOREST detector, and the γd → π0π0d reaction was identified using 6-constraint kinematic fit (energy and three-momentum conservation, and two π0 masses). The total cross section is found to be 18.4±9.2 nb for the d∗(2380) dibaryon resonance at Wγ d = 2.37 GeV, which is a candidate of the isoscalar ∆∆ quasi-bound state D03, in the γd → π0π0d reaction. The measured excitation function is consistent with the existing theoretical calculation for this reaction. At high incident energies, π0d invariant-mass distributions show a peak at approximately 2.15 GeV, which can be attributed to a N∆ quasi-bound state D12. In this contribution, the properties (mass, width, and decay angular distribution) of this peak is presented.
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M3 - Conference article
AN - SCOPUS:85052889366
VL - 310
JO - Proceedings of Science
JF - Proceedings of Science
SN - 1824-8039
T2 - 17th International Conference on Hadron Spectroscopy and Structure, Hadron 2017
Y2 - 25 September 2017 through 29 September 2017
ER -