期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.091601
关键词
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资金
- JSPS/MEXT [22-7653, 19540265, 21105504]
- Grants-in-Aid for Scientific Research [21105504, 23540284, 19540265] Funding Source: KAKEN
We present an investigation of the interquark potential determined from the q (q) over bar Bethe-Salpeter (BS) amplitude for heavy quarkonia in lattice QCD. The q (q) over bar potential at finite quark mass m(q) can be calculated from the equal-time and Coulomb gauge BS amplitude through the effective Schrodinger equation. The definition of the potential itself requires information about a kinetic mass of the quark. We then propose a self-consistent determination of the quark kinetic mass on the same footing. To verify the proposed method, we perform quenched lattice QCD simulations with a relativistic heavy-quark action at a lattice cutoff of 1/a approximate to 2.1 GeV in a range 1.0 <= m(q) <= 3.6 GeV. Our numerical results show that the q (q) over bar potential in the m(q) -> infinity limit is fairly consistent with the conventional one obtained from Wilson loops. The quark-mass dependence of the q (q) over bar potential and the spin-spin potential are also examined.
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