PIRSA:06090009

M-theory Signatures in the CMB

Ashoorioon, A. (2006). M-theory Signatures in the CMB . Perimeter Institute. https://pirsa.org/06090009

Ashoorioon, Amjad. M-theory Signatures in the CMB . Perimeter Institute, Sep. 19, 2006, https://pirsa.org/06090009 

          @misc{ pirsa_PIRSA:06090009,
            doi = {10.48660/06090009},
            url = {https://pirsa.org/06090009},
            author = {Ashoorioon, Amjad},
            keywords = {Quantum Fields and Strings, Cosmology},
            language = {en},
            title = {M-theory Signatures in the CMB },
            publisher = {Perimeter Institute},
            year = {2006},
            month = {sep},
            note = {PIRSA:06090009 see, \url{https://pirsa.org}}
          }

Amjad Ashoorioon Institute for Research in Fundamental Sciences (IPM)

DOI 10.48660/06090009
Collection
Talk Type Scientific Series
Subject

Abstract

I will demonstrate how one can realize Cascade inflation in M-theory. Cascade inflation is a realization of assisted inflation which is driven by non-perturbative interactions of N M5-branes. Its power spectrum possesses three distinctive signatures: a decisive power suppression at small scales, oscillations around the scales that cross the horizon when the inflaton potential jumps and stepwise decrease in the scalar spectral index. All three properties result from features in the inflaton potential. The features in the inflaton potential are generated whenever two M5-branes collide with the boundaries. The derived small-scale power suppression serves as a possible explanation for the dearth of observed dwarf galaxies in the Milky Way halo. The oscillations, furthermore, allow to directly probe M-theory by measurements of the spectral index and to distinguish cascade inflation observationally from other string inflation models.