Parton distribution functions and fragmentation functions of spin-1 hadrons

TL;DR

This paper reviews the current theoretical understanding of structure functions, parton distribution functions, and fragmentation functions of spin-1 hadrons, highlighting future experimental prospects at major facilities.

Contribution

It provides a comprehensive overview of the theoretical status of spin-1 hadron structure functions, including parton distributions and fragmentation functions, in preparation for upcoming experiments.

Findings

Summary of theoretical frameworks for spin-1 hadron structure functions

Discussion of multiparton distribution functions

Implications for future high-energy spin-physics experiments

Abstract

Structure functions of the spin-1 deuteron will be investigated experimentally from the late 2020's at various facilities such as Thomas Jefferson National Accelerator Facility, Fermi National Accelerator Laboratory, nuclotron-based ion collider facility, and electron-ion colliders. We expect that a new high-energy spin-physics field could be created by these projects. In this paper, the current theoretical status is explained for the structure functions of spin-1 hadrons, especially on parton distribution functions, transverse-momentum dependent parton distributions, and fragmentation functions. Related multiparton distribution functions are also shown.