Document Type

Article

Publication Date

2022

DOI

10.1103/PhysRevLett.128.062005

Publication Title

Physical Review Letters

Volume

128

Issue

6

Pages

062005 (1-7)

Abstract

High precision measurements of the polarized electron beam-spin asymmetry in semi-inclusive deep inelastic scattering (SIDIS) from the proton have been performed using a 10.6 GeV incident electron beam and the CLAS12 spectrometer at Jefferson Lab. We report here a high precision multidimensional study of single π+ SIDIS data over a large kinematic range in Bjorken x, fractional energy, and transverse momentum of the hadron as well as photon virtualities Q2 ranging from 1–7  GeV2. In particular, the structure function ratio FsinϕLU/FUU has been determined, where FsinϕLU is a twist-3 quantity that can reveal novel aspects of emergent hadron mass and quark-gluon correlations within the nucleon. The data’s impact on the evolving understanding of the underlying reaction mechanisms and their kinematic variation is explored using theoretical models for the different contributing transverse momentum dependent parton distribution functions.

Comments

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI.

Original Publication Citation

Diehl, S., Kim, A., Angelini, G, ... Yale, B., Zachariou, N., Zhang, J. (2022) Multidimensional, high precision measurements of beam single spin asymmetries in semi-inclusive 𝜋⁺ electroproduction off protons in the valence region. Physical Review Letters, 128(6), 1-7, Article 062005. https://doi.org/10.1103/PhysRevLett.128.062005

ORCID

0000-0002-4136-2572 (Bulumulla), 0000-0001-7282-8120 (Hyde), 0000-0003-2243-6836 (Kuhn)

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