Hadron masses in cavity quantum chromodynamics to order α_s~2

摘要

The non-divergent diagrams describing two-gluon exchange and annihilation between quarks and antiquarks are calculated in the Feynman gauge, based on quantum chromodynamics in a spherical cavity. Using the experimental N, Δ, Ω, and ρmasses to fit the free parameters of the M.I.T. bag model, the predicted states agree very well with the observed low-lying hadrons. As expected. The two-gluon annihilation graphs lift the degeneracy of the π and η while the ρ and ω remain degenerate. Diagonalizing the η - η ' subspace Hamiltonian yields a very good value for the mass of the η meson.