Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-01-11
Nucl.Phys. B462 (1996) 389-414
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages in LaTex with embedded psfigures using psfig.sty , to appear in Nucl. Phys. B
Scientific paper
10.1016/0550-3213(95)00680-X
Thermalization in an expanding parton plasma is studied within the framework of Boltzmann equation in the absence of any mean fields. In particular, we study the time-dependence of the relaxation time to the lowest order in finite temperature QCD and how such time-dependence affects the thermalization of an expanding parton plasma. Because of Debye screening and Landau damping at finite temperature, the relaxation time (or transport rates) is free of infrared divergencies in both longitudinal and transverse interactions. The resultant relaxation time decreases with time in an expanding plasma like $1/\tau^\beta$, with $\beta<1$. We prove in this case that thermal equilibrium will eventually be established given a long life-time of the system. However, a fixed momentum cut-off in the calculation of the relaxation time gives rise to a much stronger time dependence which will slow down thermal equilibrium. It is also demonstrated that the ``memory effect'' of the initial condition affects the approach to thermal equilibrium and the final entropy production.
Heiselberg Henning
Wang Xin-Nian
No associations
LandOfFree
Thermal Equilibration in an Expanding Parton Plasma does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Thermal Equilibration in an Expanding Parton Plasma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal Equilibration in an Expanding Parton Plasma will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-232632