${\varphi }^2$ or Not ${\varphi }^2$: Testing the Simplest Inflationary Potential

Paolo Creminelli, Diana López Nacir, Marko Simonović +2

The simplest inflationary model $V=\frac{1}{2}{m}^2{\varphi }^2$ represents the benchmark for future constraints. For a quadratic potential, the quantity $(n_s-1)+r/4+11(n_s-1{)}^2/24$ vanishes (…