Hadronization mechanisms and longitudinal polarization of Lambda in e+e-   annihilation at high energies
  We suggested that longitudinal polarization of Lambda produced in e+e- annihilation at LEP energies can provide useful information on hadronization mechanism in general and on testing the validity of different pictures for the spin content of baryon in describing the fragmentation process in particular. We present the results obtained from the calculations based on two very much different pictures.We compare the results with the recent ALEPH data and make suggestions for future measurements. 
Liang Zuo-tang (Shandong U.)