Talk by Augusto Sagnotti

On String theory and Higher Spins

I will review some aspects of the still largely unexplored links between String Theory and Higher Spins. A closer look at higher-spin fields provides some clues that String Theory describes a broken phase of a Higher-Spin Gauge Theory. Conversely, string amplitudes contain a wealth of information on higher-spin interactions that can clarify long-standing issues related to their infrared behavior.