Complex heavy-quark potential at finite temperature from lattice QCD.
We calculate for the first time the complex potential between a heavy quark and antiquark at finite temperature across the deconfinement transition in lattice QCD. The real and imaginary part of the potential at each separation distance r is obtained from the spectral function of the thermal Wilson loop. We confirm the existence of an imaginary part above the critical temperature T(C), which grows as a function of r and underscores the importance of collisions with the gluonic environment for the melting of heavy quarkonia in the quark-gluon plasma.
Department of Physics, The University of Tokyo, Tokyo 113-0031, Japan.
Alexander
A
Rothkopf
Tetsuo
T
Hatsuda
Shoichi
S
Sasaki