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arxiv:2610.10006
Bjorken sum rule down to the elastic region from the lattice
Published on Oct 7
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Abstract
We present a lattice determination of the Bjorken sum rule via a Feynman-Hellmann calculation of the polarised forward Compton amplitude. We evaluate the lowest moment of the nucleon's polarised structure function, g_1, which we calculate over the range 0.5lesssim Q^2 lesssim 8 GeV^2, covering both non-perturbative and perturbative regions. We compare our calculated moments with the Bjorken sum rule, and discuss implications for the calculation of higher-twist effects, as well as evaluations of α_s(Q^2) from hadronic quantities to complement phenomenological and other lattice methods.
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