Precise determination of αS( m Z 0 $ m_{Z^0 } $ ) from a global fit of energy-energy correlations to NNLO+NNLL predictions

Abstract

We present a determination of the strong coupling constant αS( m Z 0 $ m_{Z^0 } $ ) using a global fit of theory predictions in next-to-next-next-leading-order (NNLO) combined with resummed predictions at the next-to-next-leading-log level (NNLL) [1]. The predictions are compared to distributions of energy-energy correlations measured in e+e−annihilation to hadronic final states by experiments at the e+e−colliders LEP, PETRA, TRISTAN and PEP. The predictions are corrected for hadronisation effects using the modern generator programs Sherpa 2.2.4 and Herwig 7.1.1.