Explaining low l anomalies in the CMB power spectrum with resonant
  superstring excitations during inflation
  We explore the possibility that both the suppression of the $\ell = 2$
multipole moment of the power spectrum of cosmic microwave background
temperature fluctuations and the possible dip for $\ell = 10-30$ can be
explained as well as a possible new dip for $\ell \approx 60$ as the result of
the resonant creation of sequential excitations of a fermionic (or bosonic)
closed superstring that couples to the inflaton field. We consider a D=26
closed bosonic string with one toroidal compact dimension as an illustration of
how string excitations might imprint themselves on the CMB. We analyze the
existence of successive momentum states, winding states or oscillations on the
string as the source of the three possible dips in the power spectrum. Although
the evidence of these dips are of marginal statistical significance, this might
constitute the first observational evidence of successive superstring
excitations in Nature.
