Extraction of quark transversity distribution and Collins fragmentation functions with QCD evolution

By Zhong-Bo Kang, Alexei Prokudin, P. Sun, F. Yuan. 2015

178 citations recorded by the source corpus.

Author(s): Kang, ZB; Prokudin, A; Sun, P; Yuan, F | Abstract: © 2016 American Physical Society. We study the transverse-momentum-dependent (TMD) evolution of the Collins azimuthal asymmetries in e+e- annihilations and semi-inclusive hadron production in deep inelastic scattering processes. All the relevant coefficients are calculated up to the next-to-leading-logarithmic-order accuracy. By applying the TMD evolution at the approximate next-to-leading-logarithmic order in the Collins-Soper-Sterman formalism, we extract transversity distributions for u and d quarks and Collins fragmentation functions from current experimental data by a global analysis of the Collins asymmetries in back-to-back dihadron productions in e+e- annihilations measured by BELLE and BABAR collaborations and semi-inclusive hadron production in deep inelastic scattering data from HERMES, COMPASS, and JLab HALL A experiments. The impact of the evolution effects and the relevant theoretical uncertainties are discussed. We further discuss the TMD interpretation for our results and illustrate the unpolarized quark distribution, transversity distribution, unpolarized quark fragmentation, and Collins fragmentation functions depending on the transverse momentum and the hard momentum scale. We make detailed predictions for future experiments and discuss their impact.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/1908a0f08d04a5a05cc4dbbe273677229226c119

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In Nuclear and High Energy Physics

Citations in the corpus

FLAG Review 2019 (2019, background): “Also shown are phenomenological results using measures of transversity [925–929] (circles).”
A Guide to Light-Cone PDFs from Lattice QCD: An Overview of Approaches, Techniques, and Results (2018, background): “[230] Zhong-Bo Kang, Alexei Prokudin, Peng Sun, and Feng Yuan, “Extraction of Quark Transversity Distribution and Collins Fragmentation Functions with QCD Evolution,” Phys.”
Parton distributions and lattice-QCD calculations: Toward 3D structure (2020, methodology): “Nevertheless, PDF shapes and uncertainties are comparable to those determined in TMD analyses of the Collins effect (Anselmino et al., 2013; Kang et al., 2016), including in a dedicated studies on the role of the Soffer bound on the tensor charge (D’Alesio et al., 2020).”