Document Type

Article

Publication Date

2014

DOI

10.1103/PhysRevD.89.072011

Publication Title

Physical Review D

Volume

89

Issue

7

Pages

1-15

Abstract

We have measured the moment Asin ɸLU corresponding to the polarized electron beam-spin asymmetry in semi-inclusive deep inelastic scattering. Asin ɸLU is a twist-3 quantity providing information about quark-gluon correlations. Data were taken with the CLAS Spectrometer at Jefferson Lab using a 5.498 GeV longitudinally polarized electron beam and an unpolarized liquid hydrogen target. All three pion channels (π+0 and π-) were measured simultaneously over a large range of kinematics within the virtuality range Q2 ≈ 1.0- 4.5 GeV2. The observable was measured with better than 1% statistical precision over a large range of z, PT, xB, and Q2, which permits comparison with several reaction models. The discussed measurements provide an upgrade in statistics over previous measurements, and serve as the first evidence for the negative sign of the π- sin ɸ moment.

Comments

© 2014 American Physical Society

"Yes, the author or the author's employer may use all or part of the APS published article, including the APS-prepared version (e.g., the PDF from the online journal) without revision or modification, on the author's or employer's website as long as a fee is not charged. If a fee is charged, then APS permission must be sought. In all cases, the appropriate bibliographic citation and notice of the APS copyright must be included."

Publisher's version available at: https://doi.org/10.1103/PhysRevD.89.072011

Original Publication Citation

Adhikari, K.P., Amaryan, M.J., Hyde, C., Koirala, S., Kuhn, S.E., Weinstein, L.B., The CLAS Collaboration (2014). Beam-spin asymmetries from semi-inclusive pion electroproduction. Physical Review D, 89(7), pp.1-15, Article 072011. https://doi.org/10.1103/PhysRevD.89.072011

ORCID

0000-0001-7282-8120 (Hyde), 0000-0003-2243-6836 (Kuhn)

Included in

Nuclear Commons

Share

COinS