# Mapping the Kinematical Regimes of Semi-Inclusive Deep Inelastic Scattering

## TL;DR

This paper develops a framework to identify and analyze different kinematical regimes in semi-inclusive deep inelastic scattering, especially at moderate to low Q, linking them to partonic models and QCD factorization.

## Contribution

It introduces a language and methods for mapping kinematical regions to underlying partonic pictures in semi-inclusive deep inelastic scattering.

## Key findings

- Provides a systematic way to identify kinematical regimes
- Links kinematical regions to partonic models and QCD factorization
- Offers methods to test the consistency of kinematic regions with partonic pictures

## Abstract

We construct a language for identifying kinematical regions of transversely differential semi-inclusive deep inelastic scattering cross sections with particular underlying partonic pictures, especially in regions of moderate to low $Q$ where sensitivity to kinematical effects outside the usual very high energy limit becomes non-trivial. The partonic pictures map to power law expansions whose leading contributions ultimately lead to well-known QCD factorization theorems. We propose methods for estimating the consistency of any particular region of overall hadronic kinematics with the kinematics of a given underlying partonic picture. The basic setup of kinematics of semi-inclusive deep inelastic scattering is also reviewed in some detail.