| アブストラクト： | QCD is without any doubt the correct theory of the Strong
Interactions in the Standard Model of Physics. However,
even after many decades of experimental and theoretical
effort in understanding the structure of hadrons, and
nuclei, including the partonic dynamics inside them, our
knowledge and understanding of QCD remains
unsatisfactory, both at low and high energies. The role of
gluons, which constitute most of the distinguishing
features of QCD in comparison with QED, in determining
properties of nuclei and of hadrons including their
properties such as spin and mass, remains particularly
elusive and enigmatic. The future polarized electron ion
collider (EIC) in the US is designed to conduct a precision
study of gluons and sea quarks in QCD. In this talk we
will present the scientific case for the EIC project in the
US and present the status and proposed path towards its
realization.
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