Fragmentation functions using e+e- data from PETRA and LEP

We investigate fragmentation of charged particles in e+e- annihilation at 22, 35, and 44 GeV in terms of their polar angle and momentum distributions. From the angular distribution the ratio of longitudinal to total hadronic cross-section was determined at an average energy scale of 36.6 GeV to be ((σL)/(σtot)) = 0.076 ± 0.013. At next-to-leading order this yields αs(36.6GeV) = 0.150 ± 0.025. The ξ-1n(((1)/(χ))) distributions were used in conjunction with OPAL data from 91-208 GeV to study the scale dependence of the maximum position, ξ0. We studied flavour dependence of ξ0 as a possible explanation of this problem, using direct flavour dependent measurements of ξ0 at 91 GeV by OPAL