Matching Experimental and Theoretical Jet Definitions for   Photoproduction at HERA
  Predictions from a new next-to-leading order (NLO) calculation for direct and resolved photoproduction of one and two jets are compared to simulated HERA data. We propose a method to match experimental and theoretical jet definitions and observe a reduced dependence on jet definitions and hadronization corrections at larger transverse energies. From the irreducible uncertainty, we estimate the maximum benefit that can be obtained from increased luminosity to constrain the structure of the photon and the proton. 
J.M. Butterworth, L. Feld, M. Klasen, G. Kramer