4.11 Radiative DGLV and TG and BT elastic partonic fractional energy loss as implemented in WHDG [152] at Lhc momenta for all jet species at fixed L = 5 fm and (a) dN$_{g}$/dy = 1750 and (b) dN$_{g}$/dy = 2900; the former density comes from the$_{Phobos}$ extrapolation [87, 403], the latter from the KLN model of the color glass condensate (CGC) [400]. Δ E/E exhibits asymptotic behavior for both energy loss channels as given by the analytic pocket formulae Eq. (4.9) and Eq. (4.10). . . . . . . . . . . . 114 4.12 $_{Lhc}$predictions of pion R$_{AA}$ ( p$_{T}$ ) for several energy loss models. Curves correspond to WHDG [152], GLV [397], PQM [296], and ASW [306]. For the latter two, rw indicates the use of Eq. (4.13) for overabsorption; otherwise Eq. (4.12) was employed. Also for the latter two, ˆ q = 100 and ˆ q = 68 were the values of the ASW input parameter, respectively. Notice the sharp rise in p$_{T}$ for the WHDG and GLV curves as opposed to the flatness of the ASW and PQM ASW results. For heavy quark R$_{AA}$ ( p$_{T}$ ) predictions from WHDG see Chapter 5. . . . . . . . . . . . . . . . . . . . 116 xvi