Determination of f_0(980) Structure by Fragmentation Functions
  We discuss internal structure of an exotic hadron by using fragmentation functions. The fragmentation functions for the f_0(980) meson are obtained by a global analysis of e^++e^- \to f_0+X data. Quark configuration of the f_0(980) could be determined by peak positions and second moments of the obtained fragmentation functions. 
M. Hirai, S. Kumano, M. Oka, and K. Sudoh