A.W. Peet - 2018-06-04

Scattering Amplitudes, String Models and Gravitational Waves

The study of scattering amplitudes in field theory connects a wide range of problems, from the mathematics of string perturbation theory to computations related to gravitational waves. I will discuss a couple of topics that keep scattering amplitudes researchers busy, and that motivate an ongoing workshop at PI. First, I will give an overview of recent progress in describing interactions in particle theories in terms of "ambitwistor strings", a new type of field theory model inspired by string theory.

Saptarshi Chaudhuri - 2018-06-04

PSI 2017/2018 - Cosmology - Lecture 7

First look at CMB: surface of last scattering, Planck spectrum, multipole expansion, dark matter evidence