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Towards an Effective Field Theory of Structure Formation

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If you have a question about this talk, please contact Helvi Witek.

Over the next decade, large scale structure (LSS) surveys will play an increasingly important role in the measurement of cosmological parameters and as a probe of initial conditions. Relating the observed galaxies to the physics of the early universe requires a good understanding of several late-time sources of non-linear effects. In this talk, I will explain how, looking at large scales, effective field theory (EFT) offers a natural framework to deal with these non-linearities. After reviewing the recently developed effective field theory of large scale structure, I will explain how the halo model – a model relating the density of dark matter halo to the underlying dark matter density – can be understood in the context of EFT . In the final part of the talk, I will show explicit computations of halo statistics and discuss their observational consequences.

This talk is part of the DAMTP Friday GR Seminar series.

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