Physics Group Meeting

Scattering amplitudes, in a wide variety of gauge theories, and independent of dimension and gauge group, have surprising kinematic structure which is currently only understood in terms of graphical rules relating the kinematic weights of graphs, in much the same way that the color-factors of graphs are related: namely by Jacobi and antisymmetry. I’ll organize the discussion around an overview of what we know about this structure — introducing a novel geometric description I’m growing fond of, some of the applications at tree and multi-loop corrections, including gravitational S-matrix prediction, and conclude with some open puzzles re: it’s origin, description, and applicability to classical solutions.

For a pedagogic review (and many references)

1) TASI 2014 Lectures on Gauge and Gravity Amplitude Relations, http://arxiv.org/abs/1506.00974

Recent Generalization to QCD:

2) Color-Kinematics Duality for QCD Amplitudes, http://arxiv.org/abs/1507.00332

Recent Generalization to Spontaneously Broken theories:

3)Spontaneously Broken Yang-Mills-Einstein Supergravities as Double Copies, http://arxiv.org/abs/1511.01740

For some interesting discussion of “gravitational double copy" to classical solutions:

2) Black holes and the double copy , http://arxiv.org/abs/arXiv:1410.0239

3) The classical double copy for Taub–NUT spacetime, http://arxiv.org/abs/1507.01869

4) Static Spherically Symmetric Kerr-Schild Metrics and Implications for the Classical Double Copy , http://arxiv.org/abs/1512.02243