Speaker
Benedikt Schosser
Description
Starobinsky (or $R^2$)-inflation is one of the current best-fit models to the Planck measurements. Extending this effective theory of gravity with the additional third order term to $f(R)=M_P^2\left(R+\frac{1}{2M^2}R^2+\frac{c}{3M^4}R^3\right)$ introduces the dimensionless parameter $c$. Using the Planck measurements, we obtain constraints on the parameters of the fundamental Lagrangian and determine the combined sensitivity of next-generation CMB experiments and future neutral hydrogen maps from SKA to third-order gravity and beyond.
Primary authors
Tanmoy Modak
(Universität Heidelberg, ITP)
Tilman Plehn
(Heidelberg University)
Lennart Röver
(Universität Heidelberg)
Björn Malte Schäfer
(Universität Heidelberg)
Benedikt Schosser
