Abstract
We consider the eigenvalue problem of t′ Hooft for the meson spectrum in 2-dimensional QCD. Various alternative formulations are discussed, and their equivalence is proved. Then, a variational characterization of the eigenfunctions and the eigenvalues is derived yielding that the spectrum is discrete and consists of denumerably many positive eigenvalues tending to infinity. The corresponding eigenfunctions are real analytic, and form a complete system in L2 Finally, the number of nodes of each eigenfunctions is estimated.
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