TY  - JOUR
A1  - Dumitru, Adrian Bogdan
A1  - Nara, Yasushi
T1  - QCD plasma instabilities and isotropization
T2  - Physics Letters B
N2  - We solve the coupled Wong Yang–Mills equations for both U(1) and SU(2) gauge groups and anisotropic particle momentum distributions numerically on a lattice. For weak fields with initial energy density much smaller than that of the particles we confirm the existence of plasma instabilities and of exponential growth of the fields which has been discussed previously. Also, the SU(2) case is qualitatively similar to U(1), and we do find significant “abelianization” of the non-Abelian fields during the period of exponential growth. However, the effect nearly disappears when the fields are strong. This is because of the very rapid isotropization of the particle momenta by deflection in a strong field on time scales comparable to that for the development of Yang–Mills instabilities. This mechanism for isotropization may lead to smaller entropy increase than collisions and multiplication of hard gluons, which is interesting for the phenomenology of high-energy heavy-ion collisions.
Y1  - 2005
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/76208
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-762086
SN  - 0370-2693
VL  - 621
IS  - 1
SP  - 89
EP  - 95
PB  - Elsevier
CY  - Amsterdam u.a.
ER  -