Speaker
Description
Utilizing a thermodynamic T-matrix approach for heavy-quark (HQ) transport in the quark-gluon plasma (QGP) we compute the effects of spin-dependent interactions between partons. Based on the vacuum Cornell potential, we first confirm that the experimental values of the mass splittings in quarkonia are improved by employing a confining potential that is a mixture of vector and scalar potentials rather than a purely scalar one. We then apply the improved potential to calculate the in-medium parton spectral functions and scattering amplitudes at finite temperature self-consistently. The temperature corrections to the in-medium potential are constrained by thermal lattice-QCD “data” for the HQ free energy and equation of state. Employing these results to calculate the in-medium charm-quark transport coefficients in the QGP, we find that the mixing effect for confining potential enhances the momentum dependence of the drag coefficient, A(p), over previous calculations with a purely scalar potential, thereby also decreasing the pertinent diffusion coefficients, Ds. The refined microscopic description of HQ transport in the QGP is likely to improve the pertinent phenomenology of open heavy-flavor observables at RHIC and the LHC.
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