Power Counting Energy Flow Polynomials

Understand

Power counting is a systematic strategy for organizing collider observables and their associated theoretical calculations.

• In this paper, we use power counting to characterize a class of jet substructure observables called energy flow polynomials (EFPs).
• EFPs provide an overcomplete linear basis for infrared-and-collinear safe jet observables, but it is known that in practice, a small subset of EFPs is often sufficient for specific jet analysis tasks.
• By applying power counting arguments, we obtain linear relationships between EFPs that hold for quark and gluon jets to a specific order in the power counting.