Speaker
Baiyang Zhang
(Institute of Modern Physics, Chinese Academy of Sciences)
Description
Based on both the constituent quark picture and the instanton model for QCD vacuum, I will talk about the latest results about gluon distributions inside the constituent quark generated by the perturbative quark-gluon interaction, the non-perturbative quark gluon interaction, and the non-perturbative quark-gluon pion anomalous chromomagnetic interaction. The non-perturbative interactions are related to the existence of the instantons, strong topological fluctuations of gluon fields, in the QCD vacuum. The convolution model is applied to derive the gluon distributions in the nucleon. In the study it has been found that the pion field plays an important role in explaining both unpolarized and polarized gluon distributions in hadrons.
