Global analysis of hadron-production data in ee annihilation for determining fragmentation functions

Fragmentation functions of pion, kaon, and nucleon are determined by global analyses of hadronproduction data in ee annihilation. It is particularly important that uncertainties of the fragmentation functions are estimated for the first time. We found that light-quark and gluon fragmentation functions have large uncertainties, so that one should be careful in using these functions for hadron-production processes in heavy-ion collisions and lepton scattering. The analysis is extended to possible exotic hadron search by fragmentation functions. We found that internal structure of f0(980), such as ss̄ or tetraquark configuration, can be determined by noting differences between favored and disfavored fragmentation functions.