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ファイル | 記述 | サイズ | フォーマット | |
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PhysRevLett.131.161901.pdf | 630.95 kB | Adobe PDF | 見る/開く |
タイトル: | Doubly Charmed Tetraquark ${T}_{cc}^{+}$ from Lattice QCD near Physical Point |
著者: | Lyu, Yan Aoki, Sinya Doi, Takumi Hatsuda, Tetsuo Ikeda, Yoichi Meng, Jie |
著者名の別形: | リュー, ヤン 青木, 慎也 土井, 琢身 初田, 哲男 池田, 陽一 メン, ジエ |
キーワード: | Hadron-hadron interactions Lattice QCD Nuclear Physics Particles & Fields |
発行日: | Oct-2023 |
出版者: | American Physical Society (APS) |
誌名: | Physical Review Letters |
巻: | 131 |
号: | 16 |
論文番号: | 161901 |
抄録: | The doubly charmed tetraquark ${T}_{cc}^{+}$ recently discovered by the LHCb Collaboration is studied on the basis of (2+1)-flavor lattice QCD simulations of the D* D system with nearly physical pion mass $m_π$ = 146 MeV. The interaction of D* D in the isoscalar and S-wave channel, derived from the hadronic spacetime correlation by the HAL QCD method, is attractive for all distances and leads to a near-threshold virtual state with a pole position $E_{pole}$ = −59($^{+53}_{-99}$)($^{+2}_{-67}$) keV and a large scattering length 1/a₀ = 0.05 (5)($^{+2}_{-2}$ fm⁻¹.The virtual state is shown to evolve into a loosely bound state as $m_π$ decreases to its physical value by using a potential modified to $m_π$ = 135 MeV based on the pion-exchange interaction. Such a potential is found to give a semiquantitative description of the LHCb data on the D⁰D⁰π+ mass spectrum. Future study is necessary to perform physical-point simulations with the isospin-breaking and open three-body-channel effects taken into account. |
記述: | クォーク4個から成る「純粋テトラクォーク」 --加速器実験で見えた新粒子をスーパーコンピュータ「富岳」で解明--. 京都大学プレスリリース. 2023-10-20. |
著作権等: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. |
URI: | http://hdl.handle.net/2433/285592 |
DOI(出版社版): | 10.1103/PhysRevLett.131.161901 |
PubMed ID: | 37925709 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2023-10-20-0 |
出現コレクション: | 学術雑誌掲載論文等 |
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