Speaker
Description
A complete Monte Carlo event generator capable of accounting for quark spin effects in hadronization and other stages of the event generation in a consistent way is still lacking. An essential prerequisite to reach this goal is a sound model of hadronization such as the quantum mechanical string+${}^3P_0$ model. The string+${}^3P_0$ model describes the polarized quark fragmentation process with production of pseudoscalar mesons and vector mesons. The detailed study of the model predictions is possible through the standalone Monte Carlo implementation of the model which, among others, allows to investigate still unknown effects such as the Collins effect for vector meson production and new transverse spin asymmetries arising in the decay of vector mesons. More quantitative simulations can be obtained by StringSpinner which provides an interface of the string+${}^3P_0$ model for pseudoscalar meson production with the Pythia event generator. In this talk we present the main results obtained from simulations with the string+${}^3P_0$ model and the comparison with the existing data on SIDIS and e+e- annihilation to hadrons.
