Fragmentation functions for eta mesons are extracted at next-to-leading order accuracy of QCD in a global analysis of data taken in electron-positron annihilation and proton-proton scattering experiments. The obtained parametrization is in good agreement with all data sets analyzed and can be utilized, for instance, in future studies of double-spin asymmetries for single-inclusive eta production. The Lagrange multiplier technique is used to estimate the uncertainties of the fragmentation functions and to assess the role of the different data sets in constraining them.
@article{arxiv.1009.6145,
title = {Global Analysis of Fragmentation Functions for Eta Mesons},
author = {C. A. Aidala and F. Ellinghaus and R. Sassot and J. P. Seele and M. Stratmann},
journal= {arXiv preprint arXiv:1009.6145},
year = {2011}
}