Speaker
Description
We develop a new class of inflationary attractors which
are compatible with the recent ACT results. They are based on
fractional Kaehler potentials, $K$, for a gauge-singlet inflaton
$\sg$ which reduce, along the inflationary path, to the form
$N/(1-\sg^{q})^{p}$ with $q=1, 2$ and $0.1\leq p\leq10$. The
combination of these $K$'s with the chaotic potentials $\phi^n$
(where $n=2, 4$) within a non-linear sigma model leads to
inflationary observables which are consistent with the current
data and largely independent from $q$ and $n$. Endowing these
$K$'s with a shift symmetry we also offer a supergravity
realization of our models introducing two chiral superfields and a
monomial superpotential, linear with respect to the
inflaton-accompanying field. Inflation is attained with
subplanckian inflaton values and yields large values for the
tensor-to-scalar ratio which increases with $N$.
