Tests of perturbative QCD using CCFR data for measurements of nucleon structure functions

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Abstract

We present measurements of nucleon structure functions, F2(ϰ, Q2) and xFs(ϰ, Q2), from the high-statistics, high-energy neutrino-iron scattering experiment at the Fermilab Tevatron. The existing high-statistics xF3 determination by the CDHSW collaboration is compared to our data. The data presented here constitute the first corroboration of the QCD prediction of xF3 evolution at low-ϰ, and yields ΛMS=210±28±41 MeV, and a determination of the GLS sum rule at Q2 = 3 GeV2, SGLS = ϰ1xFsϰ=2.50±0.018 (stat.)±0.078 (syst.). Our value of ΛMS yields α3(Mz) = .111 ± .002 ± .003 ± .003 (scale). Comparison of the neutrino determination of F2(ϰ, Q2) with that obtained from the charged-lepton (e or μ) scattering leads to a precise test of the mean-square charge prediction by the Quark Parton Model. The SLAC-CCFR and BCDMS structure function provide a consistent and precise set of structure functions over a large range of Q2.

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