Loop corrections to cosmological correlation functions -- an effective coda

by Dr Subodh Patil

Friday 9 Jun 2023, 13:00 → 14:00 Europe/London

Niels Bohr Seminar Room (Schuster)

In this talk, I'll present a rather efficient shortcut to the computation for loop corrections for correlation functions of certain cosmological observables. In doing so, we hope to draw a line under a long running debate in the literature regarding the nature of the logarithmic running of inflationary correlation functions. We will present various applications to scenarios of phenomenological interest, including scrutinizing any claims of observable running in correlation functions of the scalar curvature modes, and the possibility of bounding hidden sector scenarios with a large number of species with observations of primordial tensor modes. This talk will be aimed at a particle physics audience, and will begin with a review of how cosmologists extract information about initial conditions from late time observations as a prelude to the subsequent discussion.  

 

The seminar will be given in person in Niels Bohr, Schuster.