Classical gluon fields and collective dynamics of color-charge systems

Abstract

An investigation of color fields that arise in collisions of relativistic heavy ions reveals that, in the non-Abelian case, a change in the color charge leads to the appearance of an extra term that generates a sizable contribution of color-charge glow in chromoelectric and chromomagnetic fields. The possibility of the appearance of a color echo in the scattering of composite color particles belonging to the dipole type is discussed. Arguments are adduced in support of the statement that such effects are of importance in simulating the first stage of ultrarelativistic heavy-ion collisions, where the initial parton state is determined by a high nonequilibrium parton density and by strong local color fluctuations.

Photons from the early stages of relativistic heavy-ion collisions

“…However interactions among the classical field and gluons are still present in this calculations, thanks both to the Schwinger effect which produces charged gluons, and to conduction currents which affect the evolution of the field, see the next Section for more details. It would be certainly interesting to include the effects of a magnetic color field as well as of the nonabelian terms in the classical equations of motion; the nonabelian effects have been investigated in [55] in the SU(2) case. The upgrade of our simulation code to this more realistic initial condition and early stage dynamics is in progress and the results will be the subject of forthcoming publications.…”

Radiation damping of a Yang–Mills particle revisited

“…In particular the importance of Wong's equations in the problem of the quark-gluon plasma has been considered in Refs. [26,27,28,29,30]. More recently, the consideration of the Wong's equations of motion has been discussed in the context of the double copy approach [31] and also as a possible candidate of dark matter [32].…”