Charmonium potential from full lattice QCD

Taichi Kawanai, Shoichi Sasaki

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49 Citations (Scopus)


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 -1 2.2GeV. Our simulations are performed with a relativistic heavy-quark action for the charm quark at the lightest pion mass, M π=156(7)MeV, in a spatial volume of (3fm)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.

Original languageEnglish
Article number091503
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number9
Publication statusPublished - 2012 May 30
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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