Figure 3
Illustration: Carin Cain

Figure 3: Geometry of a high-energy heavy-ion collision. The left panel shows the collision of two Lorentz-contracted gold nuclei: the radius of the gold nuclei, RAu, is contracted by γ in the direction of motion z. The right panel shows the same collision viewed from a direction that is perpendicular to the motion. The impact parameter, b, is along the x axis, and the remaining transverse direction is the y axis.