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QCD Analysis of Polarized Deep Inelastic Scattering Data

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arxiv 1005.3113 v2 pith:FMICDKK2 submitted 2010-05-18 hep-ph hep-exhep-lat

Johannes Blümlein , Helmut Böttcher This is my paper
classification hep-phhep-exhep-lat
keywords alphapolarizedanalysisarraydatadeepdetermineddistributions
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

A QCD analysis of the world data on polarized deep inelastic scattering is presented in next--to--leading order, including the heavy flavor Wilson coefficient in leading order in the fixed flavor number scheme. New parameterizations are derived for the quark and gluon distributions and the value of $\alpha_s(M_z^2)$ is determined. The impact of the variation of both the renormalization and factorization scales on the distributions and the value of $\alpha_s$ is studied. We obtain $\alpha_s^{\rm NLO}(M_Z^2) = 0.1132~~\begin{array}{l} + 0.0056 \\ -0.0095 \end{array}$. The first moments of the polarized twist--2 parton distribution functions are calculated with correlated errors to allow for comparisons with results from lattice QCD simulations. Potential higher twist contributions to the structure function $g_1(x,Q^2)$ are determined and found to be compatible with zero both for proton and deuteron targets.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. NNLO Determination of Polarized Parton Distribution Functions with Higher-Twist and Target-Mass Corrections

    hep-ph 2026-07 accept novelty 4.0 of 10

    KLS26 is an NNLO polarized PDF set from inclusive DIS that includes TMC, additive and multiplicative higher-twist terms, and positivity, with the largest NNLO shifts in the strange-quark helicity distribution.

  2. Toward Precision Helicity PDFs from Global DIS and SIDIS Fits with Projected EIC Measurements

    hep-ph 2026-02 conditional novelty 4.0 of 10

    Projected EIC pion and kaon SIDIS measurements would substantially reduce the uncertainties on the proton's sea-quark and gluon helicity distributions, most strongly at small momentum fractions.

  3. 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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