Parton Fragmentation Functions

TL;DR

This review comprehensively discusses the theoretical and experimental aspects of parton fragmentation functions, including their dependence on transverse momentum, polarization, and higher-twist effects across various high-energy processes.

Contribution

It provides an extensive overview of fragmentation functions, highlighting recent developments and covering both theoretical frameworks and experimental measurements.

Findings

Detailed analysis of transverse momentum dependence

Inclusion of polarization and higher-twist effects

Summary of experimental results across multiple processes

Abstract

The field of fragmentation functions of light quarks and gluons is reviewed. In addition to integrated fragmentation functions, attention is paid to the dependence of fragmentation functions on transverse momenta and on polarization degrees of freedom. Higher-twist and di-hadron fragmentation functions are considered as well. Moreover, the review covers both theoretical and experimental developments in single-inclusive hadron production in electron-positron annihilation, deep-inelastic lepton-nucleon scattering, and proton-proton collisions.