Figure 4

Figure 4: Constraints on LV in QED at n = 3 on a log-log plot. For negative parameters minus the logarithm of the absolute value is plotted, and region of width -10 10 is excised around each axis. The constraints in solid lines apply to q and both j±, and are symmetric about both the q and the j axis. At least one of the two pairs (j± ,q) must lie within the union of the dashed bell-shaped region and its reflection about the q axis. Intersecting lines are truncated where they cross.