Thermal QCD sum rules predict the K0*(700) scalar meson keeps its vacuum mass until about 0.6 Tc, then melts near Tc while its coupling grows.
Cawlfield et al., Phys
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Light scalar $K_{0}^{*}(700)$ meson in vacuum and a hot medium
Thermal QCD sum rules predict the K0*(700) scalar meson keeps its vacuum mass until about 0.6 Tc, then melts near Tc while its coupling grows.