Polynomial ?-attractors

Abstract Inflationary ? -attractor models can be naturally implemented in supergravity with hyperbolic geometry. They have stable predictions for observables, such as n s = 1 - 2/ N e , assuming that the potential terms of original geometric variables, well its derivatives, are not singular at boundary disk, or half-plane. In these models, canonically normalized inflaton field ? has a plateau, which is approached exponentially fast large . We call them exponential ?-attractors present closely related class where singular, but derivative boundary. The resulting also plateau potential, it approaches polynomially. polynomial Predictions two families attractors completely cover sweet spot Planck/BICEP/Keck data. ones on left, right.