Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-07-31
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages latex, 2 figures
Scientific paper
Using the Schwinger-Keldysh closed time path integral formalism we show that the magnetic screening mass in QED and QCD at one loop level is non-zero as long as the single particle distribution function f(\vec{k}) is non-isotropic, {i.e.} it depends on the direction of the momentum. For isotropic distribution functions such as those corresponding to thermal equilibrium the magnetic screening mass at one loop level is found to be zero which is consistent with finite temperature field theory. The non-zero magnetic screening mass in non-isotropic non-equlibrium situations has fundamental importance in that it acts as a natural cut-off to remove infrared divergences in the magnetic sector. Thus it allows one to avoid infrared problems which previously made it difficult to use a transport theory approach using perturbative QCD or QED scattering kernels to study the thermalization of a QED or QCD plasma.
Cooper Fred
Kao Chung-Wen
Nayak Gouranga C.
No associations
LandOfFree
Non-Zero Magnetic Screening Mass in QED and QCD at One Loop Level in Non-Equilibrium 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 Non-Zero Magnetic Screening Mass in QED and QCD at One Loop Level in Non-Equilibrium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-Zero Magnetic Screening Mass in QED and QCD at One Loop Level in Non-Equilibrium will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-476672