The gluonic excitation of the three-quark system in SU(3) lattice QCD
Abstract
We present the first study of the gluonic excitation in the three-quark (3Q) system in SU(3) lattice QCD with β=5.8 and 163 × 32 at the quenched level. For the spatially-fixed 3Q system, we measure the gluonic excited-state potential, which corresponds to the flux-tube vibrational energy in the flux-tube picture. The lowest gluonic-excitation energy in the 3Q system is found to be about 1GeV in the hadronic scale. This large gluonic-excitation energy is expected to bring about the success of the simple quark model without gluonic modes.
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