Figure 19

Figure 19: η-parameterization. Left panel: 1 and 2σ marginalized probability regions for the parameters γ and η in Eq. (1.8.6View Equation) relative to the reference case (shaded blue regions), to the optimistic case (yellow long-dashed ellipses) and to the pessimistic case (black short-dashed ellipses). The red dot marks the fiducial model while the square represents the coupling model. Right panel: present constraints on γ and η computed through a full likelihood method (here the red dot marks the likelihood peak) [307].