1108.1579 (Alexander Rothkopf et al.)

Complex Heavy-Quark Potential at Finite Temperature from Lattice QCD    [PDF]

Alexander Rothkopf, Tetsuo Hatsuda, Shoichi Sasaki

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.

View original: http://arxiv.org/abs/1108.1579