Heavy flavour kinetic equilibration in the confined phase

作者：Laine M^*

来源：The Journal of High Energy Physics, 2011, 2011(4): 124.

DOI：10.1007/JHEP04(2011)124

• Thermal Field Theory
• Heavy Quark Physics
• Chiral Lagrangians

By making use of a non-perturbative definition of a momentum diffusion coefficient as well as Heavy Meson Chiral Perturbation Theory, we investigate the Brownian motion and kinetic equilibration of heavy quark flavours deep in the confined phase. It appears that the momentum diffusion coefficient can be expressed in terms of known low-energy constants; it increases rapidly at temperatures above 50 MeV, behaving as similar to T-7/F-pi(4) for m(pi)/pi << T << F-pi where m(pi) and F-pi are the pion mass and decay constant, respectively. The early increase may suggest a broad peak in kappa/T-3 around the QCD crossover. For a more detailed understanding the computation could be generalized in a number of ways.

• 出版日期2011-4