Heavy quark radiation in an anisotropic hot QCD medium

Abstract

The impact of momentum anisotropy of the medium on the heavy quarks (HQs) dynamics has been investigated in a hot QCD medium while considering both collisional and radiative processes within the ambit of the Fokker-Planck approach. The relative orientation of the HQs motion (momentum vector) with respect to the direction of anisotropy is responsible for the character of transport coefficients. Therefore, the drag and diffusion coefficients of the HQs are decomposed, respectively, into two and four components by considering a general tensor basis. The transport coefficients of the HQs are decomposed into two (drag coefficients) and four (diffusion coefficients) components by assuming a general tensor basis. Each component of the drag and diffusion coefficient of the HQs has been analyzed in detail. It is observed that the anisotropy has a significant impact on the transport coefficients of the HQ for both the collisional and the radiational processes. The nuclear suppression factor, RAA, has been computed considering the anisotropic medium. It is observed that the momentum anisotropy affects the RAA of the HQs significantly in both elastic and inelastic cases.