Gluonic-Excitation Energies and Abelian Dominance in SU(3) QCD
arXiv:2003.05203 · doi:10.1103/PhysRevD.102.014512
Abstract
We present the first study of the Abelian-projected gluonic-excitation energies for the static quark-antiquark (Q) system in SU(3) lattice QCD at the quenched level, using a lattice at . We investigate ground-state and three excited-state Q potentials, using smeared link variables on the lattice. We find universal Abelian dominance for the quark confinement force of the excited-state Q potentials as well as the ground-state potential. Remarkably, in spite of the excitation phenomenon in QCD, we find Abelian dominance for the first gluonic-excitation energy of about 1 GeV at long distances in the maximally Abelian gauge. On the other hand, no Abelian dominance is observed for higher gluonic-excitation energies even at long distances. This suggests that there is some threshold between 1 and 2 GeV for the applicable excitation-energy region of Abelian dominance. Also, we find that Abelian projection significantly reduces the short-distance -like behavior in gluonic-excitation energies.
arXiv comment7 pages, 3 figures
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