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giving T ∗ ≃ T $^{QCD}$/ 3 1 / $^{4}$, and to fit the coupling λ = g 2 $_{SY M}$N$_{c}$ ≈ 5 . 5 in order to reproduce the static quark-antiquark forces calculated via lattice QCD. 

The string theoretic result for the diffusion coefficient used in the Langevin 

