In a magnetized NJL model, the pi0 spectral function develops multiple magnetic-field-induced peaks and the q-qbar scattering phase shift jumps at threshold energies, with anisotropic dependence on finite meson momentum.
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$q\bar{q}$ scattering phase shift in the $\pi^0$ channel and ${\pi}^0$ meson spectral function under external magnetic field and finite meson momentum
In a magnetized NJL model, the pi0 spectral function develops multiple magnetic-field-induced peaks and the q-qbar scattering phase shift jumps at threshold energies, with anisotropic dependence on finite meson momentum.