Effects on the CMB from Compactification Before Inflation
  Many theories beyond the Standard Model include extra dimensions, though
these have yet to be directly observed. In this work we consider the
possibility of a compactification mechanism which both allows extra dimensions
and is compatible with current observations. This compactification is predicted
to leave a signature on the CMB by altering the amplitude of the low l
multipoles, dependent on the amount of inflation. Recently discovered CMB
anomalies at low multipoles may be evidence for this. In our model we assume
the spacetime is the product of a four-dimensional spacetime and flat extra
dimensions. Before the compactification, both the four-dimensional space- time
and the extra dimensions can either be expanding or contracting independently.
Taking into account physical constraints, we explore the observational
consequences and the plausibility of these different models.
