CMB anomalies from an inflationary model in string theory
  Recent Planck measurements show some CMB anomalies on large angular scales,
which confirms the early observations by WMAP. We show that an inflationary
model, in which before the slow-roll inflation the Universe is in a
superinflationary phase, can generate a large-scale cutoff in the primordial
power spectrum, which may account for not only the power suppression on large
angular scales, but also a large dipole power asymmetry in the CMB. We discuss
an implementation of our model in string theory.
