87 Chapter 3: v$_{2}$ vs. R$_{AA}$ as a Constraint on sQGP Dynamics because the “edge” of the medium is then poorly defined), the necessarily larger final punch magnitude will still be of order 1 GeV. The magnitude of this deconfinement-caused momentum boost must be independent of the parton’s momentum; hence v$_{2}$ ( p$_{T}$ ) will decrease like 1 /p$_{T}$ . Moreover, since ϵ is larger out of plane than in, a fixed Δ p$_{T}$ enhances R$_{AA}$ ( π/ 2) more than R$_{AA}$ (0). These are precisely the trends seen by$_{Phenix}$ [367]. Keeping the same values for κ , k , Δ p$_{T}$ , etc. as for Au + Au , we show in Fig. 3.3 the centrality-binned R$_{AA}$ and v$_{2}$ results for Cu + Cu in the three geometric energy loss models. We can in fact go further in thinking about the origin of this deconfinement mechanism. Specifically we will find the change in the Debye mass of the jet µ$_{i}$ ( ⃗ x, t ) = gT ( ⃗ x$_{i}$, t$_{i}$ ) as it propagates through the medium provides the right order of magnitude momentum punch. In moving from position i to i + 1 one Figure 3.3: Cu + Cu results for GREL (black, dotted), GREL with the punch (red, solid), and GREL with absorption (blue, dashed).