Renormalons in the energy-energy correlator

Abstract

Abstract The energy-energy correlator (EEC) is an observable of wide interest for collider physics and Standard Model measurements, due to both its simple theoretical description in terms of the energy-momentum tensor and its novel features for experimental studies. Significant progress has been made in both applications and higher-order perturbative predictions for the EEC. Here, we analyze the nature of the asymptotic perturbative series for the EEC by determining its analytic form in Borel space under the bubble-sum approximation. This result provides information on the leading and subleading nonperturbative power corrections through renormalon poles. We improve the perturbative convergence of the MS ¯ $$ \overline{\textrm{MS}} $$ series for the EEC by removing its leading renormalon using an MSR scheme, which is independent of the bubble-sum approximation. Using the leading MSR scheme power correction determined by fits to thrust, we find good agreement with EEC OPAL data already at O $$ \mathcal{O} $$ ( α s 2 $$ {\alpha}_s^2 $$ ).

Keywords

• Effective Field Theories of QCD
• Nonperturbative Effects
• Renormalization Group