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The heavy quark momentum diffusion coefficient (𝜅) is one of the most important ingredients for the Langevin description of the heavy quark dynamics. In the temperature regime relevant for the heavy ion collision phenomenology, there exists a substantial difference between the lattice estimations of 𝜅 and the corresponding leading order (LO) result from the hard thermal loop (HTL) perturbation theory. Moreover, the indication of poor convergence in the next-to-leading order (NLO) perturbative analysis has motivated the development of several approaches to incorporate the non-perturbative effects in the heavy quark phenomenology. In this work [1], we estimate the heavy quark diffusion coefficient based on the Gribov-Zwanziger prescription. In this framework, the gluon propagator, depends on the temperature dependent Gribov mass parameter which has been obtained self consistently from the one loop gap equation. Incorporating this modified gluon propagator in the leading order analysis, we
find a reasonable agreement with the existing lattice estimations of 𝜅 within the model uncertainties.
[1] Estimation of the diffusion coefficient of heavy quarks in light of Gribov-Zwanziger action ; Sadaf Madni, Arghya Mukherjee, Aritra Bandyopadhyay, Najmul Haque; Published in: Phys.Lett.B 838 (2023) 137714
