Document Type
Article
Publication Date
2021
DOI
10.1103/PhysRevLett.126.062002
Publication Title
Physical Review Letters
Volume
126
Issue
6
Pages
1-6
Abstract
A first measurement of the longitudinal beam spin asymmetry ALU in the semi-inclusive electroproduction of pairs of charged pions is reported. ALU is a higher-twist observable and offers the cleanest access to the nucleon twist-3 parton distribution function e(x). Data have been collected in the Hall-B at Jefferson Lab by impinging a 5.498-GeV electron beam on a liquid-hydrogen target, and reconstructing the scattered electron and the pion pair with the CLAS detector. One-dimensional projections of the AsinLUϕR moments are extracted for the kinematic variables of interest in the valence quark region. The understanding of dihadron production is essential for the interpretation of observables in single-hadron production in semi-inclusive DIS, and pioneering measurements of single-spin asymmetries in dihadron production open a new avenue in studies of QCD dynamics.
Original Publication Citation
Amaryan, M.J., Hattawy, M., Kuhn, S.E., Prok, Y, Zhang, J., Zhao, J.W., CLAS Collaboration (2021). Beam spin asymmetry in semi-inclusive electroproduction of hadron pairs. Physical Review Letters, 126(6), 1-6, Article 062002. https://doi.org/10.1103/PhysRevLett.126.062002
ORCID
0000-0002-5648-0256 (Amaryan), 0000-0003-2243-6836 (Kuhn)
Repository Citation
Amaryan, M. J.; Hattawy, M.; Kuhn, S. E.; Prok, Y.; Zhang, J.; Zhao, Z. W.; et al.; and CLAS Collaboration, "Beam Spin Asymmetry in Semi-Inclusive Electroproduction of Hadron Pairs" (2021). Physics Faculty Publications. 460.
https://digitalcommons.odu.edu/physics_fac_pubs/460
Included in
Elementary Particles and Fields and String Theory Commons, Nuclear Commons, Plasma and Beam Physics Commons
Comments
Published under a Creative Commons Attribution 4.0 International license (CC BY 4.0).