Event Shape Variables at NLLA+NNLO

Abstract

In this talk we report work on the matching of the next-to-leading logarithmic approximation (NLLA) onto the fixed next-to-next-to-leading order (NNLO) calculations for event shape distributions in electron-positron annihilation. Furthermore we present preliminary results on the determination of the strong coupling constant obtained using NLLA+NNLO predictions and ALEPH data.

Comments: 5 pages, 2 figs. Proceedings of a parallel talk given at LCWS08, Chicago, IL, USA, 11/16-20/2008