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Title Accessing gluon polarization with high-P_T hadrons in SIDIS
Authors Richard Whitehill, Y. Zhou, Nobuo Sato, Wolodymyr Melnitchouk
JLAB number JLAB-THY-22-3743
LANL number arXiv:2210.12295
Other number DOE/OR/23177-5634, ADP-22-30/T1201
Document Type(s) (Journal Article) 
Associated with EIC: Yes
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)

Compiled for Physical Review D
Volume 107
Publication Abstract: Recent global QCD analysis of jet production and other polarized scattering data have found the presence of negative solutions for the gluon helicity distribution in the proton, $\Delta g$, along with the traditional $\Delta g > 0$ solutions. We consider polarized semi-inclusive deep-inelastic scattering for hadrons produced with large transverse momentum as a means of constraining the dependence of $\Delta g$ on the parton momentum fraction, $x$. Focusing on the double longitudinal spin asymmetry, we identify the kinematics relevant for future experiments at Jefferson Lab and the Electron-Ion Collider which are particularly sensitive to the polarized gluon channel and could discriminate between the different $\Delta g$ behaviors.
Experiment Numbers: other
Document: pdf
Accepted Manuscript: PhysRevD.107.034033.pdf
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