Phenomenological Aspects of No-Scale Inflation Models
  We discuss phenomenological aspects of no-scale supergravity inflationary
models motivated by compactified string models, in which the inflaton may be
identified either as a K\"ahler modulus or an untwisted matter field, focusing
on models that make predictions for the scalar spectral index $n_s$ and the
tensor-to-scalar ratio $r$ that are similar to the Starobinsky model. We
discuss possible patterns of soft supersymmetry breaking, exhibiting examples
of the pure no-scale type $m_0 = B_0 = A_0 = 0$, of the CMSSM type with
universal $A_0$ and $m_0 \ne 0$ at a high scale, and of the mSUGRA type with
$A_0 = B_0 + m_0$ boundary conditions at the high input scale. These may be
combined with a non-trivial gauge kinetic function that generates gaugino
masses $m_{1/2} \ne 0$, or one may have a pure gravity mediation scenario where
trilinear terms and gaugino masses are generated through anomalies. We also
discuss inflaton decays and reheating, showing possible decay channels for the
inflaton when it is either an untwisted matter field or a K\"ahler modulus.
Reheating is very efficient if a matter field inflaton is directly coupled to
MSSM fields, and both candidates lead to sufficient reheating in the presence
of a non-trivial gauge kinetic function.
