2011/10/31 by Taichi Kawanai, Shoichi Sasaki · 1 citation
Physics and Astronomy · #Gluon #High-Energy Particle Collisions Research #Lattice QCD #Lattice field theory #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #hep-lat #hep-ph
paper · pdf · doi:10.1103/physrevd.85.091503
published as Phys. Rev. D 85: 091503(R), 2012 · 5 pages, 3 figures
openalex publication_date 2012/05/30 · arxiv created 2012/06/04 · arxiv updated 2012/06/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present both spin-independent and spin-dependent parts of a central interquark potential for charmonium states, which is calculated in 2+1 flavor dynamical lattice QCD using the PACS-CS gauge configurations with a lattice cutoff of a^\ensuremath-1\ensuremath≈2.2 GeV. Our simulations are performed with a relativistic heavy-quark action for the charm quark at the lightest pion mass, M_\ensuremathπ=156(7) MeV, in a spatial volume of (3 fm)3. We observe that the spin-independent charmonium potential obtained from lattice QCD with almost physical quark masses is quite similar to the Cornell potential used in nonrelativistic potential models. The spin-spin potential, which is calculated in full lattice QCD for the first time, properly exhibits a finite-range repulsive interaction. Its r-dependence is different from the Fermi-Breit type potential, which is widely adopted in quark potential models.