Heavy-quark mass effects in Energy-Energy Correlation

Energy-Energy Correlation (EEC) in electron-positron annihilation into hadrons at high energy, gives the distribution of the angular distance between hadronic jets in the final state. 

The measure is usually inclusive over quark flavors, implying that also beauty (charm) quark Correlations are included. Given the great accuracy reached in both  experimental and present theoretical (perturbative) calculations, the inclusion of beauty mass effects is highly recommended.

We present a simple formalism to consistently include heavy-quark mass effects in the Energy-Energy Correlation in the two-jet region, dominated by large Sudakov logarithms which need to be resummed to all orders of perturbation theory.