Joint cosmology seminar at Tufts:

Tuesday, October 16, 2012, 2:30 pm
Robinson Hall, Room 250
Tufts University
Refreshments at 2:00 in Knipp Library, Room 251

The Effective Field Theory of Cosmological Structure Formation

Mark Hertzberg


Since the matter density fluctuations in the universe are linear on large scales and nonlinear on small scales, a consistent long distance description requires integrating out the strongly coupled short distance modes and building an effective field theory. This reorganizes the matter into a type of fluid, with associated parameters, that describes cosmological structure formation. I will describe (i) the properties of this fluid on sub-horizon scales, (ii) its renormalization and perturbation theory, (iii) the explicit measurement of its fluid parameters, and (iv) the computation of the power spectrum.