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Transport coefficients of heavy quarks around Tc at finite quark chemical potential.
- Source :
-
Physical Review C: Nuclear Physics . Nov2014, Vol. 90 Issue 5, p1-4. 4p. - Publication Year :
- 2014
-
Abstract
- The interactions of heavy quarks with the partonic environment at finite temperature T and finite quark chemical potential μq are investigated in terms of transport coefficients within the dynamical quasiparticle model (DQPM) designed to reproduce the lattice-QCD (lQCD) results (including the partonic equation of state) in thermodynamic equilibrium. These results are confronted with those of nuclear many-body calculations close to the critical temperature Tc. The hadronic and partonic spatial diffusion coefficients join smoothly and show a pronounced minimum around Tc at μq = 0 as well as at finite μq. Close to and above Tc its absolute value maTches the lQCD calculations for μq = 0. The smooth transition of the heavy-quark transport coefficients from the hadronic to the partonic medium corresponds to a crossover in line with lattice calculations, and differs substantially from perturbative-QCD calculations which show a large discontinuity at Tc. This indicates that in the vicinity of Tc dynamically dressed massive partons should be the effective degrees of freedom in the quark-gluon plasma. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 05562813
- Volume :
- 90
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Physical Review C: Nuclear Physics
- Publication Type :
- Academic Journal
- Accession number :
- 100120465
- Full Text :
- https://doi.org/10.1103/PhysRevC.90.051901