106 Chapter 4: Fluctuations in Jet Tomography Note that geometric fluctuations reduce charm quark quenching in Fig. 4.6 relative to the fixed L = 5 fm case in Fig. 4.5. This is seen even more dramatically for gluons in Fig. 4.7: the overquenching of gluons in Fig. 4.5 is reduced by a factor ∼ 2 when geometric fluctuations are taken into account. Nevertheless, even with path fluctuations the gluons are still quenched by a factor of 10 when elastic energy loss is included in addition to radiative. Figure 4.7: As in Fig. 4.6 but for light u, d quarks and gluons. The yellow bands are computed in this case with effective g, u path lengths L$_{g}$ = 4 . 0 and L$_{u}$ = 5 . 0 fm based on Eq. (4.7). Note that charm and light quark quenching are similar in this p$_{T}$ range. The amplified role of elastic energy loss is due to its smaller width for fluctuations relative to radiative fluctuations. Even in moderately opaque me- dia with L/λ ∼ 10, inelastic energy loss fluctuations are large because only