<b>High Energy-Astrophysics</b><br><i>Structure Formation in Modified Gravity</i>

Speaker: Roman Scoccimarro, New York University

I will discuss signatures of modified theories of gravity that attempt to explain cosmic acceleration, and how they impact different observables (BAO, clusters and lensing) from small to large scales. The talk will focus on one example of such theories (brane-induced gravity) and on nonlinear effects, that have not received much attention until recently. In particular we will present new signatures of non-Gaussianity and study the mechanism by which gravity becomes general relativity at small scales, both using perturbation theory and N-body simulations.