First Monte Carlo Global Analysis of Nucleon Transversity with Lattice QCD Constraints

ORAL

Abstract

We report on the first global QCD analysis of the quark transversity distributions in the nucleon from semi-inclusive deep-inelastic scattering (SIDIS), using a Monte Carlo method based on nested sampling and constraints on the isovector tensor charge gT from lattice QCD. A simultaneous fit to the available SIDIS Collins asymmetry data is compatible with gT values extracted from a comprehensive reanalysis of existing lattice simulations, in contrast to previous analyses, which found significantly smaller gT values.

*This work was supported by the U. S. Department of Energy Contract No. DE-AC05-06OR23177, under which Jefferson Science Associates, LLC operates Jefferson Lab, and by the National Science Foundation Contracts No. PHY-1623454, PHY-1653405, and PHY-1659177.

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Presenters

  • Wally Melnitchouk

    • Jefferson Lab
    • Jefferson Laboratory

Authors

  • Wally Melnitchouk

    • Jefferson Lab
    • Jefferson Laboratory

  • Huey-Wen Lin

    • Michigan State Univ
    • Michigan State University

  • Alexei Prokudin

    • Penn State Berks

  • Nobuo Sato

    • Univ of Connecticut

  • Harvey F Shows III

    • Louisiana State Univ - Baton Rouge