Abstract
The fully resummed next-to-leading-order perturbative calculation of the energy-energy correlation in e+e− annihilation is extended to include the leading non-perturbative power-behaved contributions computed using the ``dispersive method'' applied earlier to event shape variables. The correlation between a leading (anti)quark and a gluon produces a non-perturbative 1/Q contribution, while non-perturbative effects in the quark-antiquark correlation give rise to a smaller contribution ln Q2/Q2. In the back-to-back region, the power-suppressed contributions actually decrease much more slowly, as small non-integer powers of 1/Q, as a result of the interplay with perturbative effects.
The hypothesis of a universal low-energy form for the strong coupling relates the coefficients of these contributions to those measured for other observables.