88 Chapter 3: v$_{2}$ vs. R$_{AA}$ as a Constraint on sQGP Dynamics calculates the deflection of the jet following a slight generalization the usual means. At i the parton has momentum k µ i = ( ω, k$_{|}$$_{|}$, k$_{⊥}$$_{,i}$ ), where the parallel direction is defined by the local line of constant temperature in 2 D and the perpendicular direction is its normal; the normal is in the direction of the 2 D gradient of the medium temperature, equivalently density. By symmetry crossing the plane cannot affect the parallel component of the momentum so at i + 1 we have k µ i +1 = ( ω, k$_{|}$$_{|}$, k$_{⊥}$$_{,i}$$_{+1}$ ). Then As the jet moves to the less dense edges of the medium and the whole fireball cools as it Bjorken expands µ$_{i}$$_{+1}$ < µ$_{i}$ , and the jet receives a continuous punch in the local normal direction. This will tend to bend the jets, focusing them into higher v$_{2}$ and simultaneously increase the R$_{AA}$ . For a quark (gluon) produced in the center of a 20-40% centrality collision at τ$_{0}$ = . 2 fm and followed until T = T$_{c}$ = 160 MeV the change in Debye mass is 0.38 (0.55) GeV which is slightly smaller (larger) than the nominal 0.5 GeV investigated earlier. It will be interesting to see if a more quantitative calculation in a realistic diffuse medium will meet the expectation that the data can be understood from this mechanism. k 2 ⊥ ,i +1 = k 2 ⊥ ,i + µ 2 i − µ 2 i $_{+1}$. (3.11)