Speaker
Description
Since the EMC collaboration measurement of the small quark spin contribution to the proton spin in the late 1980s, the nuclear physics community has been actively working to resolve the so-called proton spin puzzle. While the size of the quark spin contribution is fairly well established, the gluon spin contribution is not as well established and recently has met theoretical tension. Recent global QCD analyses of jet production and other polarized scattering data find the presence of negative gluon helicity distributions, $\Delta g$, compatible with the existing data in addition to the traditional positive $\Delta g$ distributions. In this work, we present an analysis of semi-inclusive deep inelastic scattering for produced hadrons with large transverse momentum for further constraint of the dependence of $\Delta g$ on the parton momentum fraction, $x$, and focusing on the double longitudinal spin asymmetry, we identify kinematic regions relevant to future experiments at JLab and the Electron-Ion Collider which are particularly sensitive to $\Delta g$ and are capable of distinguishing the different $\Delta g$ distributions.
| Submitted on behalf of a Collaboration? | No |
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