# SPIN 2018

9-14 September 2018
University of Ferrara
Europe/Rome timezone
23RD INTERNATIONAL SPIN SYMPOSIUM

## Probing the Spin Structure of the Nucleon: Recent Results and Upcoming Measurements of SSF and their moments at JLab

12 Sep 2018, 15:30
20m

### A10

Parallel Sessions Nucleon Helicity Structure

### Speaker

The last several years of Jefferson Lab's 6~GeV physics program saw a wealth of nucleon spin structure measurements run across several Halls. In particular, E06-014 ($d_2^n$") in Hall A (polarized neutron), and E07-003 (SANE") in Hall C (polarized proton) took advantage of significant advances in target design and new/upgraded large solid angle detector packages to run precision measurements of neutron and proton spin structure functions (SSFs) over a broad range in $x$ and $Q^2$ during the 6 GeV era. These measurements of $g_1$, $g_2$, spin asymmetries $A_1$ $A_2$ and the associated higher twist reduced matrix element $d_2$ are fundamentally coupled to quark-gluon interactions and transverse momentum of the quarks in the nucleon, and are among the cleanest higher twist observables we can access. Those now-final data on the neutron and proton will be revisited, and upcoming measurements that exploit JLab's 12~GeV upgrade will be presented.