Radiatively Generated Leptogenesis in 𝑆_𝟒 Flavor Symmetry Models

Figure 4

Allowed parameter region by the 1𝜎 experimental constraints (2.9) for the ratio 𝑟=𝑏/𝑎 as a function of cos𝜙. The blue (dark) and red (light) curves correspond to the IH and NH ordering.