Volume 317 - The 9th International workshop on Chiral Dynamics (CD2018) - Session: Plenary Program
Experimental studies at lowQ2 of the spin structure of the nucleon at Jefferson Lab
A. Deur
Full text: pdf
Published on: February 28, 2020
Abstract
We summarize the experimental program of Jefferson Lab that studies the nucleon spin structure at low $Q^2$. This program completes the precise experimental mapping of the nucleon spin structure functions $g_1(\nu, Q^2)$ and $g_2(\nu, Q^2)$ and their moments started at SLAC, CERN and DESY at high $Q^2$, and continued at Jefferson Lab at intermediate $Q^2$.
The results presented cover the domain where Chiral Effective Field Theory ($\chi$EFT) should describe the strong interaction. They provide a comprehensive set of benchmark measurements for $\chi$EFT.
The preliminary conclusion is that nucleon spin structure data are still challenging for $\chi$EFT in spite of the notable improvements in these calculations.
DOI: https://doi.org/10.22323/1.317.0005
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