Theoretical perspective for the future experiments on parton densities

Understand

I explain the current status of parton-distribution-function (PDF) studies and future experimental prospects on their determinations.

• First, unpolarized PDFs of the nucleon are introduced as a field of precision QCD physics including higher-order $\alpha_s$ corrections.
• Second, nuclear PDFs and polarized nucleonic PDFs are discussed.
• Third, the determination of fragmentation functions is explained.