New angles on energy correlators

Energy correlators have recently become central to jet substructure studies at colliders, because they effectively separate physics at different scales, are robust to contamination from soft radiation, and connect directly with quantum field theory. After discussing several applications of energy correlators, I will focus on higher-point correlators. First, I'll discuss an approximation scheme for the fast evaluation of projected N-point correlators (projected onto the largest separation between particles). I’ll then extend this method to non-integer N, showing how this provides access to small-x physics in jets as N approaches zero. Next, I will discuss a new parametrization for higher-point correlators, which dramatically reduces the computational cost for evaluating them on experimental data, and provides more information about the relative orientation of particles in a jet. Notably, for projected energy correlators, analytic results for the old and new definitions only start to differ at next-to-next-to-leading logarithmic accuracy. If time permits, I’ll also discuss energy-weighted observable correlations (EWOCs), where we consider correlations in other observables than the angle.