論文

査読有り 本文へのリンクあり
2019年2月10日

Non-strange dibaryons studied in the γd → π0π0d reaction

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
  • T. Ishikawa
  • ,
  • H. Fujimura
  • ,
  • H. Fukasawa
  • ,
  • R. Hashimoto
  • ,
  • Q. He
  • ,
  • Y. Honda
  • ,
  • T. Iwata
  • ,
  • S. Kaida
  • ,
  • H. Kanda
  • ,
  • J. Kasagi
  • ,
  • A. Kawano
  • ,
  • S. Kuwasaki
  • ,
  • K. Maeda
  • ,
  • S. Masumoto
  • ,
  • M. Miyabe
  • ,
  • F. Miyahara
  • ,
  • K. Mochizuki
  • ,
  • N. Muramatsu
  • ,
  • A. Nakamura
  • ,
  • K. Nawa
  • ,
  • S. Ogushi
  • ,
  • Y. Okada
  • ,
  • K. Okamura
  • ,
  • Y. Onodera
  • ,
  • K. Ozawa
  • ,
  • Y. Sakamoto
  • ,
  • M. Sato
  • ,
  • H. Shimizu
  • ,
  • H. Sugai
  • ,
  • K. Suzuki
  • ,
  • Y. Tajima
  • ,
  • S. Takahashi
  • ,
  • Y. Taniguchi
  • ,
  • Y. Tsuchikawa
  • ,
  • H. Yamazaki
  • ,
  • R. Yamazaki
  • ,
  • H. Y. Yoshida

789
開始ページ
413
終了ページ
418
記述言語
日本語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.physletb.2018.12.050

© 2018 The Author(s) Coherent double neutral-pion photoproduction on the deuteron, γd→π0π0d, has been experimentally studied at incident photon energies ranging from 0.75 to 1.15 GeV. The total cross section as a function of the γd center-of-mass energy shows resonance-like behavior, which peaks at approximately 2.47 and 2.63 GeV. The measured angular distribution of deuteron emission is rather flat, which cannot be reproduced by the kinematics of quasi-free π0π0 production with deuteron coalescence. In π0d invariant-mass distributions, a clear peak is observed at 2.14±0.01 GeV/c2 with a width of 0.09±0.01 GeV/c2. The spin-parity of this state is restricted to 1+, 2+ or 3− from the angular distributions of the two π0s. The present work shows strong evidence for the existence of an isovector dibaryon resonance with a mass of 2.14 GeV/c2. The 2+ assignment is consistent with the theoretically predicted D12 state, and also with the energy dependence of the πd partial-wave amplitude P23 for the π±d→π±d and π+d→pp reactions.

リンク情報
DOI
https://doi.org/10.1016/j.physletb.2018.12.050
Scopus
https://www.scopus.com/record/display.uri?eid=2-s2.0-85059480100&origin=inward
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85059480100&origin=inward 本文へのリンクあり
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85059480100&origin=inward

エクスポート
BibTeX RIS