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We study the isoscalar and isovector $J=0,1$ mesons with the overlap operatorwithin two flavour lattice QCD. After subtraction of the lowest-lying Diraceigenmodes from the valence quark propagator all disconnected contributionsvanish and all possible point-to-point $J=0$ correlators become identical,signaling a simultaneous restoration of both $SU(2)_L \times SU(2)_R$ and$U(1)_A$ symmetries. The ground states of the $\pi,\sigma,a_0,\eta$ mesons donot survive this truncation. All possible $J=1$ states have a very cleanexponential decay and become degenerate, demonstrating a $SU(4)$ symmetry of adynamical QCD-like string.

Mesons upon low-lying Dirac mode exclusion