In the quark-meson model with FRG, charged-pion spectral functions develop multiple peaks from Landau-level decay and annihilation channels, becoming broad resonances at lower temperature and density than neutral mesons.
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Multi-peak structure of meson spectral function in magnetic field
In the quark-meson model with FRG, charged-pion spectral functions develop multiple peaks from Landau-level decay and annihilation channels, becoming broad resonances at lower temperature and density than neutral mesons.