TL;DR
This paper discusses combining NLLA and NNLO calculations for event shape distributions in electron-positron annihilation, and presents preliminary results on the strong coupling constant using these predictions and ALEPH data.
Contribution
It introduces a matching of NLLA with NNLO calculations for event shape variables and applies this to determine the strong coupling constant.
Findings
Successful matching of NLLA and NNLO for event shapes
Preliminary determination of the strong coupling constant
Enhanced precision in QCD tests
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.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Medical Imaging Techniques and Applications · Quantum Chromodynamics and Particle Interactions