Chang-Hwan Lee (Pusan)
"Mass of Mesonic Bound States Above Tc"
By extending the Bielefeld LGS (Lattice Gauge Simulation) color
singlet interaction, we find that the masses of pi, sigma, rho
and a_1 excitations, 32 degrees of freedom in all, go to zero
(in the chiral limit) as T -> T_c. This result indicates a
smooth phase transition at T_c, at which from above the masses
and couplings of mesons vanish `a la Brown-Rho scaling. We
discuss that our scenario successfully explains the STAR (STAR
Collaboration) rho^0/pi^- ratio in Au-Au peripheral collisions
at RHIC.
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