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Parton Distributions, d/u, and Higher Twist Effects at High X

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arxiv hep-ph/9809480 v4 pith:OWDF6OZQ submitted 1998-09-22 hep-ph hep-ex

classification hep-phhep-ex
keywords datapartondistributionshighhighertwistagreementasymmetry
verification ladder T0 review T1 audit T2 compute T3 formal

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A re-analysis of the NMC and SLAC data leads to a great improvement in our knowledge of the valence d and u parton distribution functions at high x. Standard parton distributions with our modifications are in good agreement with QCD predictions for d/u at x=1, and with the CDHSW nu p and nubar p data, the HERA charged current cross section data, the collider high-P_t jet data, and the CDF W asymmetry data. With the inclusion of target mass and higher twist corrections, the modified PDF's also describe all DIS data up to x = 0.98 and down to Q^2 = 1 GeV^2.

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  1. Neutron valence structure from nuclear deep inelastic scattering

    nucl-th 2019-08 conditional novelty 6.0 of 10

    The extracted F2^n/F2^p ratio saturates at 0.47 ± 0.04 as x approaches 1, supporting perturbative QCD and Dyson-Schwinger predictions over scalar diquark models.

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