Radiation Gauge in AdS/QCD: inadmissibility and implications on spectral functions in the deconfined phase
arXiv:1510.05490 · doi:10.1016/j.physletb.2015.10.074
Abstract
We point out a subtlety in choosing the radiation gauge (A_z=0 combined with the Lorenz gauge) for gauge fields in AdS/QCD for black hole backgrounds. We then demonstrate the effect of this on the momentum-dependence of the spectral functions of the J/psi vector meson, showing a spreading with momentum and a breaking of isotropy, in contrast to previous results in the literature. We also discuss the dependence on a background magnetic field, following our earlier proposed model.
10 pages, v2: added reference, version accepted for publication