|
Abstract |
Measurements of how matter clusters on large scales can help answer some of the
remaining mysteries in Cosmology. Even though the large scale dynamics of the
matter in our Universe is simple, the theory that describes fluctuations on large
scales is modified by the effect of the very non-linear dynamics on smaller
scales. The large scale dynamics is described by the Effective Theory of Large
Scale Structure framework. I will describe the framework. I will describe its
application to current data, in particular a determination of the Hubble constant
(H0 = 68.6±1.1 km s-1 Mpc-1) which does not use CMB data. A major challenge in
this
framework is to calibrate the free parameters of the theory that encode the
effects of the small scales on the large ones. Constraining these parameters from
the large scale clustering data leads to significant degradation in the
cosmological constraints. One could imagine constraining these parameters using a
combination of small scale simulations and observations. I will discuss the
accuracy required of this calibration to improve constraints from future surveys. |
