Anisotropic lattice results indicate a small negative mass shift and increasing thermal width for heavy quarkonia, with the first high-temperature masses and spectral functions reported for B mesons.
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Lattice QCD calculations indicate charmonium states persist below the open-charm threshold up to 305 MeV but develop temperature-dependent thermal widths that increase with state size.
QCD at high T has three phases differing in symmetries, degrees of freedom and N_c scaling: hadron gas below T_ch, stringy fluid between T_ch and T_d, and quark-gluon plasma above T_d.
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Three regimes/phases of QCD at high T, their symmetries and N_c scaling
QCD at high T has three phases differing in symmetries, degrees of freedom and N_c scaling: hadron gas below T_ch, stringy fluid between T_ch and T_d, and quark-gluon plasma above T_d.