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The full set of Polarized Deep Inelastic Scattering Structure Functions at NNLO accuracy

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arxiv 2210.12014 v2 pith:W37DBFE2 submitted 2022-10-21 hep-ph

classification hep-ph
keywords functionsstructurealphacoefficientmathcalparitypolarizedaccuracy
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present the second order contributions to the coefficient functions for the parity violating polarized structure functions $g_L$ and $g_4$, thus completing the $\mathcal{O}(\alpha_S^2)$ knowledge on DIS structure functions. We obtain the missing $\mathcal{O}(\alpha_S^2)$ pieces from the known parity conserving unpolarized coefficient functions. We also present a phenomenological analysis for the phase space region the future Electron-Ion Collider is set to explore.

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  1. Global analyses of helicity-dependent parton distribution functions

    hep-ph 2026-07 accept novelty 2.0 of 10

    Modern global QCD analyses agree that up-quark helicity is positive and down-quark helicity negative, with positive gluon polarisation at moderate x, while the full gluon spin moment remains limited by the unmeasured ...

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