102 Chapter 4: Fluctuations in Jet Tomography 4.3 Numerical Results: Parton Level In Fig. 4.5, we show the quenching pattern of Q from the second approach for a “typical” path length scale L = 5 fm, similar to that used in previous calculations [374]. The curves show R$_{Q}$ ( p$_{T}$ ), prior to hadronization, for Q = g, u, c, b . The dashed curves show the quenching arising from only the DGLV radiative energy loss. The solid curves show the full results after including TG elastic as well as DGLV radiative energy loss. Adding elastic loss is seen to increase the quenching of all flavors for fixed path length. Note especially the strong increase of the gluon suppression and the factor ∼ 2 increase of the bottom suppression. The curious switch of the u and the c quenching reflects the extra valence (smaller index n$_{u}$ ) contribution to light quarks. Fig. 4.5 emphasizes the unavoidable result of using a fixed, “typical” path length scale, L , in jet tomography: the pion and single electron quenching can never be similar. If pions were composed only of light quarks and electrons only of charm, then we would expect comparable quenching for both. However, contributions from highly quenched gluons decrease the pion R$_{AA}$ while weakly quenched bottom quarks increase the electron R$_{AA}$ . Therefore, in the fixed length scenario, we expect a noticeable difference between pion and single electron suppression patterns. In Fig. 4.4 we use fluctuating path lengths. The solid curves labeled by the parton flavor Q = g, u, c, b show the relative transverse coordinate density