BICEP/Keck Constraints on Attractor Models of Inflation and Reheating
  Recent BICEP/Keck data on the cosmic microwave background, in combination
with previous WMAP and Planck data, impose strong new constraints on the tilt
in the scalar perturbation spectrum, $n_s$, as well as the tensor-to-scalar
ratio, $r$. These constrain the number of e-folds of inflation, $N_*$, the
magnitude of the inflaton coupling to matter, $y$, and the reheating
temperature, $T_{\rm reh}$, which we evaluate in attractor models of inflation
as formulated in no-scale supergravity. The 68% C.L. region of $(n_s, r)$
favours large values of $N_*, y$ and $T_{\rm reh}$ that are constrained by the
production of gravitinos and supersymmetric dark matter.
