APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Vicente Atal (Leiden U)
Title: Decoupling during Inflation and the presence of High Energy Physics in the CMB
Date (JST): Wed, Nov 05, 2014, 13:30 - 14:30
Place: Seminar Room A
Related File: 1271.pdf
Abstract: I will present a situation in which the low energy effective theory during inflation has a non trivial signature of very massive degrees of freedom. This happens whenever in a multifield trajectory there are turns that couple the light with the heavy field. The resulting effective theory is a single-field description with a varying speed of sound, which depends on the turning rate of the trajectory. I will derive the adiabatic condition under which the single field theory is valid, present the the predictions for the two and three point function and show a search for such features in the Planck data.