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Measurement of alpha-s from scaling violations in fragmentation functions in e+ e- annihilation

Research output: Contribution to journalJournal article

Published

Journal publication date1995
JournalPhysics Letters B
Journal number3
Volume357
Number of pages13
Pages487-499
Original languageEnglish

Abstract

A study of scaling violations in fragmentation functions performed by the ALEPH collaboration at LEP is presented. Data samples enriched in uds, c, b and gluon jets, respectively, together with measurements of the longitudinal and transverse inclusive cross sections are used to extract the fragmentation function for the gluon and for each flavour. The measurements are compared to data from experiments at energies between 22 GeV and 91 GeV and scaling violations consistent with QCD predictions are observed. From this, a measurement of the strong coupling constant αs(Mz) = 0.126 ±0.009 is obtained.