6533b838fe1ef96bd12a52b5
RESEARCH PRODUCT
Spectral function of fermions in a highly occupied non-Abelian plasma
K. BoguslavskiT. LappiM. MaceS. Schlichtingsubject
Heavy-ion collisionsNuclear and High Energy PhysicsNuclear Theoryquark-gluon plasmanonequilibrium QFTThermal QFTHigh Energy Physics - Lattice (hep-lat)Quark-gluon plasmakvarkki-gluoniplasmaFOS: Physical scienceshard-thermal loopheavy-ion collisionsspectral functionhiukkasfysiikkathermal QFT114 Physical sciencesSpectral functionNuclear Theory (nucl-th)High Energy Physics - PhenomenologyHigh Energy Physics - LatticeHigh Energy Physics - Phenomenology (hep-ph)Hard-thermal loopkvanttikenttäteoriaNonequilibrium QFTdescription
We develop a method to obtain fermion spectral functions non-perturbatively in a non-Abelian gauge theory with high occupation numbers of gauge fields. After recovering the free field case, we extract the spectral function of fermions in a highly occupied non-Abelian plasma close to its non-thermal fixed point, i.e., in a self-similar regime of the non-equilibrium dynamics. We find good agreement with hard loop perturbation theory for medium-induced masses, dispersion relations and quasiparticle residues. We also extract the full momentum dependence of the damping rate of the collective excitations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2022-01-01 |