Supersymmetric Clockwork Axion Model and Axino Dark Matter
  Implications of supersymmetrizing the clockwork axions are studied.
Supersymmetry ensures that the saxions and axinos have the same pattern of the
coupling hierarchy as the clockwork axions. If we assume supersymmetry breaking
is universal over the clockwork sites, the coupling structure is preserved,
while the mass orderings of the saxions and axinos can differ depending on the
supersymmetry breaking scale. While the massive saxions and axions quickly
decay, the lightest axino can be stable and thus a dark matter candidate. The
relic abundance of the axino dark matter from thermal production is mostly
determined by decays of the heavier axinos in the normal mass ordering. This
exponentially enhances the thermal yield compared to the conventional axino
scenarios. Some cosmological issues are discussed.
