TY  - JOUR
A1  - Qin, Si-xue
A1  - Rischke, Dirk H.
T1  - Charmonium spectral functions and transport properties of quark-gluon plasma
T2  - Physics Letters B
N2  - We study vacuum masses of charmonia and the charm-quark diffusion coefficient in the quark-gluon plasma based on the spectral representation for meson correlators. To calculate the correlators, we solve the quark gap equation and the inhomogeneous Bethe–Salpeter equation in the rainbow-ladder approximation. It is found that the ground-state masses of charmonia in the pseudoscalar, scalar, and vector channels can be well described. For 1.5Tc<T<3.0Tc, the value of the diffusion coefficient D is comparable with that obtained by lattice QCD and experiments: 3.4<2πTD<5.9. Relating the diffusion coefficient with the ratio of shear viscosity to entropy density η/s of the quark-gluon plasma, we obtain values in the range 0.09<η/s<0.16.
KW  - Charmonium
KW  - Quark-gluon plasma
KW  - Transport properties
KW  - Diffusion coefficient
KW  - Spectral functions
KW  - Dyson–Schwinger equations
KW  - Bethe–Salpeter equation
KW  - Nonperturbative methods
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/77005
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-770059
SN  - 0370-2693
VL  - 734
SP  - 157
EP  - 161
PB  - Elsevier
CY  - Amsterdam
ER  -