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Title: Doubly Charmed Tetraquark ${T}_{cc}^{+}$ from Lattice QCD near Physical Point
Authors: Lyu, Yan
Aoki, Sinya
Doi, Takumi
Hatsuda, Tetsuo
Ikeda, Yoichi
Meng, Jie
Author's alias: 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
Keywords: Hadron-hadron interactions
Lattice QCD
Nuclear Physics
Particles & Fields
Issue Date: Oct-2023
Publisher: American Physical Society (APS)
Journal title: Physical Review Letters
Volume: 131
Issue: 16
Thesis number: 161901
Abstract: 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.
Description: 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.
Rights: 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.
DOI(Published Version): 10.1103/PhysRevLett.131.161901
PubMed ID: 37925709
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