Superconformal Inflationary $\alpha$-Attractors

摘要: Recently a broad class of superconformal inflationary models was found leading to universal observational prediction $n_s=1-2/N$ and $r=12/N^2$. Here we generalize this by introducing parameter $\alpha$ inversely proportional the curvature inflaton Kahler manifold. In small (large $\alpha$) limit, predictions coincide with generic chaotic inflation models. However, for sufficiently large (small $\alpha$), converge attractor regime $r=12\alpha/N^2$, which corresponds part $n_s-r$ plane favored Planck data.