Mass-suppressed effects in heavy quark diffusion

Journal of High Energy Physics

M. Laine¹  A. Bouttefeux¹ 

[1] AEC, Institute for Theoretical Physics, University of Bern;

关键词: Thermal Field Theory;    Heavy Quark Physics;    Lattice QCD;    Quark-Gluon Plasma;   

DOI  :  10.1007/JHEP12(2020)150

来源: DOAJ

【 摘 要 】

Abstract Many lattice studies of heavy quark diffusion originate from a colour-electric correlator, obtained as a leading term after an expansion in the inverse of the heavy-quark mass. In view of the fact that the charm quark is not particularly heavy, we consider subleading terms in the expansion. Working out correlators up to O $$ \mathcal{O} $$ (1/M 2), we argue that the leading corrections are suppressed by O $$ \mathcal{O} $$ (T/M), and one of them can be extracted from a colour-magnetic correlator. The corresponding transport coefficient is non-perturbative already at leading order in the weak-coupling expansion, and therefore requires a non­perturbative determination.

【 授权许可】

Unknown