"Strings tying gauge theories to gravity" by Oliver Schlotterer (Max-Planck-Institute fuer Gravitationsphysics)

Tuesday, February 21, 2017 - 10:45am to 11:45am
Special TEP Seminar

Guest Speaker: Oliver Schlotterer

Talk Title:  “Strings tying gauge theories to gravity”


Scattering amplitudes connect quantum field theory with collider experiments and test the high-energy predictivity of (super)gravity. Moreover, scattering amplitudes hint at new symmetries and unexpected connections between physical theories which are otherwise invisible in their conventional computation via Feynman diagrams or a Lagrangian description. Yet, many of these hidden structures are conveniently accessible to string theory where gauge interactions and gravity arise as the low-energy excitations of open and closed strings. In this talk, I will illustrate how string amplitudes bypass the intimidating combinatorial complexity of Feynman diagram and give an intuitive picture of gravity as a double copy of gauge interactions. Also, the closely related duality between color and kinematic degrees of freedom in gauge theories due to Bern, Carrasco and Johansson will be underpinned using string-theory methods.

4-330 PAB