Phys. Rev. Lett. 85, 5288–5291 (2000)Strong Coupling Constant from Scaling Violations in Fragmentation FunctionsReceived 30 March 2000; published in the issue dated 18 December 2000 We present a new determination of the strong coupling constant αs 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 √s = 29GeV. At next-to-leading order, we find αs(5)(MZ) = 0.1170±0.0073. A new world average of αs is given. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.5288
DOI:
10.1103/PhysRevLett.85.5288
PACS:
13.65.+i, 13.85.Ni, 13.87.Fh
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