A T-Matrix Calculation for in-Medium Heavy-Quark Gluon Scattering

Understand

The interactions of charm and bottom quarks in a Quark-Gluon Plasma (QGP) are evaluated using a thermodynamic 2-body T-matrix.

• We specifically focus on heavy-quark (HQ) interactions with thermal gluons with an input potential motivated by lattice-QCD computations of the HQ free energy.
• The latter is implemented into a field-theoretic ansatz for color-Coulomb and (remnants of) confining interactions.
• This, in particular, enables to discuss corrections to the potential approach, specifically hard-thermal-loop corrections to the vertices, relativistic corrections deduced from pertinent Feynman diagrams, and a suitable projection on transverse thermal gluons.