Towards the dynamical study of heavy-flavor quarks in the Quark-Gluon-Plasma

14th International Conference on Strangeness in Quark Matter

Berrehrah, H.^1 ; Bratkovskaya, E.^1 ; Cassing, W.^2 ; Gossiaux, P.B.^3 ; Aichelin, J.^3

Frankfurt Institute for Advanced Studies, Institute for Theoretical Physics, Johann Wolfgang Goethe Universität, Ruth-Moufang-Strasse 1, 60438 Frankfurt am Main, Germany^1

Institut für Theoretische Physik, Universität Giessen, 35392 Giessen, Germany^2

Subatech, UMR 6457, Université de Nantes, 4 rue Alfred Kastler, 44307 Nantes cedex 3, France^3

关键词: Collisional scatterings;    Elastic cross sections;    Finite width;    Heavy-quark;    Leading orders;    Quark-gluon plasma;    Quasi particles;    Relativistic nuclei;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/509/1/012076/pdf
DOI  :  10.1088/1742-6596/509/1/012076

来源: IOP

【 摘 要 】

Within the aim of a dynamical study of on- and off-shell heavy quarks Q in the quark gluon plasma (QGP)-as produced in relativistic nucleus-nucleus collisions-we study the heavy quark collisional scattering on partons of the QGP. The elastic cross sections σQ,g-Q are evaluated for perturbative partons (massless on-shell particles) and for dynamical quasi-particles (massive off-shell particles as described by the dynamical quasi-particles model «DQPM») using the leading order Born diagrams. We demonstrate that the finite width of the quasi-particles in the DQPM has little influence on the cross sections σQ,g-Q except close to thresholds. We, furthermore, calculate the heavy quark relaxation time as a function of temperature T within the different approaches using these cross sections.