Polarized parton distributions from charged-current deep-inelastic scattering and future neutrino factories

Abstract

We discuss the determination of polarized parton distributions from charged-current deep-inelastic scattering experiments. We summarize the next-to-leading order treatment of charged-current polarized structure functions, their relation to polarized parton distributions and scale dependence, and discuss their description by means of a next-to-leading order evolution code. We discuss current theoretical expectations and positivity constraints on the unmeasured C-odd combinations Delta q-Delta qbar of polarized quark distributions, and their determination in charged-current deep-inelastic scattering experiments. We give estimates of the expected errors on charged-current structure functions at a future neutrino factory, and perform a study of the accuracy in the determination of polarized parton distributions that would be possible at such a facility. We show that these measurements have the potential to distinguish between different theoretical scenarios for the proton spin structure.

35 pages, 13 figures, plain TeX with harvmac; Final version, to be published in Nucl. Phys. B. Typo in eq 2.13 corrected and two references added

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• NNLO jet production in neutral and charged current polarized deep inelastic scattering
• Impact of recent COMPASS data on polarized parton distributions and structure functions
• Tests of flavor universality for neutrino-Z couplings in future neutrino experiments
• Towards an understanding of nucleon spin structure: from hard to soft scales
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• The relations between Bjorken polarized, Bjorken unpolarized and Gross--Llewellyn Smith sum rules
• On the lepton-nucleon neutral and charged current deep inelastic scattering cross sections
• Highlights of Short Baseline Physics at a Neutrino Factory
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• Probe of anomalous neutrino couplings to W and Z in medium energy setup of a beta-beam facility
• A rigorous bound on quark distributions in the nucleon
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