Single Spin Asymmetries in Charged Kaon Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ${}^3\mathrm{He}$ Target

Abstract

We report the first measurement of target single spin asymmetries of charged kaons produced in semi-inclusive deep inelastic scattering of electrons off a transversely polarized ${}^3\mathrm{He}$ target. Both the Collins and Sivers moments, which are related to the nucleon transversity and Sivers distributions, respectively, are extracted over the kinematic range of 0.1$<$$x_{bj}$$<$0.4 for $K^{+}$ and $K^{-}$ production. While the Collins and Sivers moments for $K^{+}$ are consistent with zero within the experimental uncertainties, both moments for $K^{-}$ favor negative values. The Sivers moments are compared to the theoretical prediction from a phenomenological fit to the world data. While the $K^{+}$ Sivers moments are consistent with the prediction, the $K^{-}$ results differ from the prediction at the 2-sigma level.

arXiv comment6 pages, 3 figures

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• Updated QCD global analysis of single transverse-spin asymmetries I: Extracting $\tilde{H}$, and the role of the Soffer bound and lattice QCD
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• Azimuthal transverse single-spin asymmetries of inclusive jets and identified hadrons within jets from polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV
• Twist-4 contributions to semi-inclusive $e^{+}{e}^{-}$-annihilation process
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• Double Spin Asymmetries of Inclusive Hadron Electroproductions from a Transversely Polarized ${}^3\mathrm{He}$ Target
• Towards three-dimensional nucleon structures at the Electron-Ion Collider in China: A study of the Sivers function
• Double Spin Asymmetries $A_{LT}^{\cos {\varphi }_S}$ and $A_{LT}^{\cos (2{\varphi }_h-{\varphi }_S)}$ in semi-inclusive DIS
• First measurement of unpolarized SIDIS cross section and cross section ratios from a ${}^3$He target
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• Energy Independence of the Collins Asymmetry in $p^{\uparrow }p$ Collisions
• Probing the Sivers asymmetries through $J/\psi$ photoproduction in ${\mathrm{p}}^{\uparrow }\mathrm{p}$ collision with forward proton tagging
• Single Inclusive ${\pi }^{\pm }$ and $K^{\pm }$ Production in $e^{+}{e}^{-}$ Annihilation at center-of-mass Energies from 2.000 to 3.671GeV
• Exploring the Quark Transversity and the Collins Fragmentation Functions using Polarized $pp$ Collisions at STAR
• The Sivers asymmetry of vector meson production in semi-inclusive deep inelastic scattering