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arXiv · 1612.06927

Neutral-Current Weak Interactions at an EIC

Y. X. Zhao·A. Deshpande·J. Huang·K. S. Kumar·S. Riordan
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Abstract

A simulation study of measurements of neutral current structure functions of the nucleon at the future high-energy and high-luminosity polarized electron-ion collider (EIC) is presented. A new series of $γ-Z$ interference structure functions, $F_1^{γZ}$, $F_3^{γZ}$, $g_1^{γZ}$, $g_5^{γZ}$ become accessible via parity-violating asymmetries in polarized electron-nucleon deep inelastic scattering (DIS). Within the context of the quark-parton model, they provide a unique and, in some cases, yet-unmeasured combination of unpolarized and polarized parton distribution functions. The uncertainty projections for these structure functions using electron-proton collisions are considered for various EIC beam energy configurations. Also presented are uncertainty projections for measurements of the weak mixing angle $\sin^2 θ_W$ using electron-deuteron collisions which cover a much higher $Q^2$ than that is accessible in fixed target measurements. QED and QCD radiative corrections and effects of detector smearing are included with the calculations.

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Y. X. Zhao, A. Deshpande, J. Huang, K. S. Kumar, S. Riordan. 2017-02-28. Neutral-Current Weak Interactions at an EIC. https://doi.org/10.1140/epja%2Fi2017-12245-2

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