Theoretical Physics Seminar: Lance Dixon

The Energy-Energy Correlator at Small Angles

How energy is distributed in quantum field theories is of broad interest, from conformal field theories to jets at the Large Hadron Collider. There has been a lot of recent theoretical progress in analyzing the correlation of energy deposited in two detectors separated by an angle, in electron-positron annihilation, in Higgs boson decays to light hadrons, and in conformal field theories. I will present a factorization formula for the small angle limit, which allows large logarithms to be resummed based on timelike evolution. Next-to-next-to-leading logarithmic accurate predictions will be presented for QCD, N=1 and N=4 supersymmetric Yang-Mills theories. In the latter, conformally invariant theory, a reciprocity relation between time-like and space-like evolution can be used to establish an equivalence to other recent approaches based on light-ray operators and Mellin representations. These results may lead to a more quantitative understanding of jet substructure at the LHC.