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Cosmology from large-scale structure: concordance and discordance

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If you have a question about this talk, please contact Tobias Baldauf.

I will review some recent and forthcoming datasets that aim to extract fundamental cosmology from the galaxy distribution, particularly the DES and DESI experiments. A particular issue in this field is the control of systematics, and I will discuss steps that are taken to ensure that results of a given experiment are internally consistent. But there has been a recent tendency for less than perfect agreement between different experiments (“tensions”), indicating either possible new physics or undiagnosed systematics. I will discuss a proposal for how the latter may be allowed for in order to derive conservative limits on cosmological parameters.

This talk is part of the Cosmology Lunch series.

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