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May 27, 2025 to June 13, 2025
Jefferson Lab
US/Eastern timezone

Nonlinear QCD at Small-x: Parton Model vs Dipole Model

Jun 11, 2025, 2:30 PM
10m
CEBAF Center Rm. F113 (Jefferson Lab)

CEBAF Center Rm. F113

Jefferson Lab

12000 Jefferson Ave. Newport News VA 23606

Speaker

Junaid Saif Khan (Southern Methodist University)

Description

Understanding the small-x regime of Quantum Chromodynamics (QCD) is crucial for advancing high-energy nuclear physics. In this non-linear domain--where gluon densities become large and saturation effects emerge--traditional perturbative frameworks, such as the Parton Model, become inadequate. Instead, the Dipole Model, which is better suited for describing non-perturbative dynamics at small-x, gains relevance. One of the key research goals for the upcoming Electron-Ion Collider (EIC) is the experimental verification of these effects. This research aims to leverage the well-established techniques used in the extraction of Parton Distribution Functions (PDFs) for the Dipole Model to support the experimental efforts. Preliminary results show that the dipole framework reproduces the parton model structure functions at medium-x, highlighting the overlap between the valid kinematic regions of the two descriptions.

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