Multi-particle production in QCD and gravity at high energies: from amplitudes to shockwaves

These lectures discuss multi-particle production in QCD and in gravity, remarkable double copy relations, and strong parallels in emergent shockwave dynamics. We motivate the strong relevance of these topics for experimental programs and their role in resolving outstanding open problems.We derive explicitly a BFKL RG equation for multi-gluon production, whose dynamics is captured by a 2-D reggeon EFT. Identical methods apply for multi-graviton production. BFKL RG evolution generates non-perturbative wee parton states of maximal occupancy, whose many-body dynamics can be described as a Color Glass Condensate (CGC). A universal shockwave picture of deeply inelastic scattering and hadron-hadron collisions emerges, wherein the strongly correlated dynamics provides a rich ab initio picture of how quark-gluon plasmas form. Gluon radiation in the CGC EFT has a double copy in gravitational shockwave collisions, which describes multi-particle production in strong fields, self-force and tidal contributions, and classical and quantum noise in the focusing of geodesics. This opens an EFT window into gravitational wave radiation and black hole formation.

Zoom link: https://icts-res-in.zoom.us/j/98189803732?pwd=EnE3hFfRlACGalJdf6jTO4REHurhea.1
Meeting ID: 981 8980 3732
Passcode: 202030