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Particle correlation measurements associated with a hard or semi-hard triggerin heavy-ion collisions may reflect Mach cone shockwaves excited in the bulkmedium by partonic energy loss. This is of great interest because, whencompared with theory, such measurements can provide information on thetransport properties of the medium. Specifically, the formation of Mach coneshockwaves is sensitive to the viscosity and speed of sound, as well as thedetailed nature of the jet medium interaction. However, modeling the physics ofshockwave excitation to obtain a meaningful comparison with the measuredcorrelations is very challenging since the correlations arise from an interplayof perturbative as well as non-perturbative phenomena at different momentumscales. In this work we take a step in that direction by presenting asystematic study of the dependence of azimuthal particle correlations on thespatio-temporal structure of energy deposition into the medium. Our resultsindicate that detailed modeling of the evolution of an initially produced hardparton and the interaction of this evolving state with the medium is crucial,as both magnitude and shape of the shockwave signal show a strong dependence onthe assumptions being made.

The Mach cone signal and energy deposition scenarios in linearized hydrodynamics