Neutrino Mass from Cosmology

Figure 4

Isocontours of the final value of Δ𝑁_eff in the sin²2𝜃_𝑠-𝛿𝑚²_𝑠 plane for vanishing lepton asymmetry and 𝛿𝑚²_𝑠>0 (left panel) and 𝛿𝑚²_𝑠<0 (right panel). The star denotes the best-fit mixing parameters as in the 3+1 global fit in [41]: (𝛿𝑚²_𝑠,sin²2𝜃_𝑠)=(0.9eV²,0.089). Adapted from [37].

(a)

(b)