Strong Coupling Constant from Scaling Violations in Fragmentation Functions
B. A. Kniehl, G. Kramer, B. Pötter
Abstract
We present a new determination of the strong coupling constant alphas through the scaling violations in the fragmentation functions for charged pions, charged kaons, and protons. In our fit we include the latest e+e- annihilation data from CERN LEP1 and SLAC SLC on the Z-boson resonance and older, yet very precise data from SLAC PEP at center-of-mass energy sqrt(s)=29 GeV. A new world average of alphas is given.
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