Paper detail

Jet Quenching in Anisotropic Holographic QCD: Probing Phase Transitions and Critical Regions

The jet quenching phenomenon in an anisotropic quark-gluon plasma is studied using gauge-gravity duality. We consider a more general orientation of the contour of a lightlike Wilson loop in the boundary field theory. The Nambu-Goto action for a two-dimensional worldsheet, whose boundary is this contour, is evaluated in a five-dimensional bulk. We present the dependence of the jet quenching parameter on the orientation. Discontinuities of the jet quenching parameter occur at a first-order phase transition, and their magnitude depends on the orientation. These dependencies are observed in holographic models for both light and heavy quarks with nonzero temperature, chemical potential, magnetic field, and spatial anisotropy, supported by an Einstein-dilaton-three-Maxwell action.