Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-04-21
Phys.Rev.D78:065008,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, 6 figures. Changes from v3: Typos fixed in the subscripts of various Casimir factors
Scientific paper
10.1103/PhysRevD.78.065008
There exist full leading-order-in-alpha_s numerical calculations of the rates for massless quarks and gluons to split and join in the background of a quark-gluon plasma through hard, nearly collinear bremsstrahlung and inverse bremsstrahlung. In the limit of partons with very high energy E, where the physics is dominated by the Landau-Pomeranchuk-Migdal (LPM) effect, there are also analytic leading-log calculations of these rates, where the logarithm is ln(E/T). We extend those analytic calculations to next-to-leading-log order. We find agreement with the full result to within roughly 20% for E(less) >~ 10 T, where E(less) is the energy of the least energetic parton in the splitting/joining process. We also discuss how to account for the running of the coupling constant in the case that E/T is very large. Our results are also applicable to isotropic non-equilibrium plasmas if the plasma does not change significantly over the formation time associated with particle splitting.
Arnold Peter
Dogan Caglar
No associations
LandOfFree
QCD Splitting/Joining Functions at Finite Temperature in the Deep LPM Regime 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 QCD Splitting/Joining Functions at Finite Temperature in the Deep LPM Regime, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and QCD Splitting/Joining Functions at Finite Temperature in the Deep LPM Regime will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-37076