PIRSA:08060133 Conference Quantum Fields and Strings

DOI10.48660/08060133

Conference/School: PASCOS 08

Geshnizjani, G. (2008). Constraining the inflationary action with cosmological observations. Perimeter Institute. https://pirsa.org/08060133

Geshnizjani, Ghazal. Constraining the inflationary action with cosmological observations. Perimeter Institute, Jun. 03, 2008, https://pirsa.org/08060133 

@misc{ pirsa_PIRSA:08060133,
  doi = {10.48660/08060133},
  url = {https://pirsa.org/08060133},
  author = {Geshnizjani, Ghazal},
  keywords = {Quantum Fields and Strings, Particle Physics, Cosmology},
  language = {en},
  title = {Constraining the inflationary action with cosmological observations},
  publisher = {Perimeter Institute},
  year = {2008},
  month = {jun},
  note = {PIRSA:08060133 see, \url{https://pirsa.org}}
}

Abstract

If inflation is to be considered in an unbiased way, as possibly originating from one of a wide range of underlying theories,then observations need not be simply applied to reconstructing the inflaton potential, V(phi), or a specific kinetic term, as in DBI inflation, but rather to reconstruct the inflationary action in its entirety. I will discuss the constraints that can be placed on a generalsingle field action from measurements of the primordial scalar and tensor fluctuation power spectra and non-Gaussianities. I will also briefly present the flow equation formalism for reconstructing a general inflationary Lagrangian, in a general gauge, that reduces to canonical and DBI inflation in a specific gauge.

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