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Publication Information
Title High precision measurements of as at the future EIC
Abstract We present a projection study for the first moments of the inclusive spin structure function $\int g_1(x,Q^2) \, dx$ for the proton and neutron from simulated doubly-polarized $\vec{e}\vec{p}$ and $\vec{e}$-$^3 \overrightarrow{\rm He}$ collision data expected from the Electron-Ion collider. For detection and extraction of the neutron spin asymmetries from $\vec{e}$-$^3 \overrightarrow{\rm He}$ collisions, we used the double-tagging method which significantly reduces the uncertainty over the traditional inclusive method. Using the Bjorken sum rule, the projected results allow us to determine that the QCD coupling at the $Z$-pole $\alpha_s(M_{Z^0}^2)$ can be measured with a relative precision of $1.3\%$. This underscores the significance of the EIC for achieving precision determinations of $\alpha_s$.
Author(s) Tyler Kutz, Jackson Pybus, Darren Upton, Cameron Cotton, Abhay Deshpande, Alexandre Deur, Bill Wenliang, Dien Nguyen, Michael Nycz, Xiaochao Zheng
Publication Date October 2024
Document Type Journal Article
Primary Institution Massachusetts Institute of Technology, Cambridge, MA
Affiliation Exp Nuclear Physics / Experimental Halls / Hall D
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-PHY-24-4044 OSTI Number: 2458213
LANL Number: arXiv:2406.05591 Other Number: DOE/OR/23177-7478
Associated with an experiment No
Associated with EIC Yes
Supported by Jefferson Lab LDRD Funding No
Journal Article
Journal Name Physical Review D
Refereed Yes
Volume 110
Issue
Page(s) 074004
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