Beam-spin Asymmetries from Semi-inclusive Pion Electroproduction
Abstract
We have measured the moment A{sup sin{phi}}{sub LU} corresponding to the polarized electron beam-spin asymmetry in SIDIS. A{sup sin{phi}}{sub LU} 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 (pi{sup +}, pi{sup 0} and pi{sup -}) were measured simultaneously over a large range of kinematics within the virtuality range Q{sup 2} ~ 1.0-4.5 GeV{sup 2}. The observable was measured with good statistical precision over a large range of z, P{sub T}, x{sub B}, and Q{sup 2}, 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 {pi}{sup -} sin{phi} Moment.
- Authors:
-
- University of Connecticut, Storrs, CT (United States)
- Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1127340
- Report Number(s):
- JLAB-PHY-14-1846; DOE/OR/23177-3012; arXiv:1402.4097
Journal ID: ISSN 0556-2821; TRN: US1400279
- DOE Contract Number:
- AC05-06OR23177
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review. D, Particles Fields
- Additional Journal Information:
- Journal Volume: 89; Journal Issue: 07; Journal ID: ISSN 0556-2821
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Gohn, Wesley P., Avakian, Harut A., Joo, Kyungseon, and Ungaro, Maurizio. Beam-spin Asymmetries from Semi-inclusive Pion Electroproduction. United States: N. p., 2014.
Web. doi:10.1103/PhysRevD.89.072011.
Gohn, Wesley P., Avakian, Harut A., Joo, Kyungseon, & Ungaro, Maurizio. Beam-spin Asymmetries from Semi-inclusive Pion Electroproduction. United States. https://doi.org/10.1103/PhysRevD.89.072011
Gohn, Wesley P., Avakian, Harut A., Joo, Kyungseon, and Ungaro, Maurizio. 2014.
"Beam-spin Asymmetries from Semi-inclusive Pion Electroproduction". United States. https://doi.org/10.1103/PhysRevD.89.072011. https://www.osti.gov/servlets/purl/1127340.
@article{osti_1127340,
title = {Beam-spin Asymmetries from Semi-inclusive Pion Electroproduction},
author = {Gohn, Wesley P. and Avakian, Harut A. and Joo, Kyungseon and Ungaro, Maurizio},
abstractNote = {We have measured the moment A{sup sin{phi}}{sub LU} corresponding to the polarized electron beam-spin asymmetry in SIDIS. A{sup sin{phi}}{sub LU} 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 (pi{sup +}, pi{sup 0} and pi{sup -}) were measured simultaneously over a large range of kinematics within the virtuality range Q{sup 2} ~ 1.0-4.5 GeV{sup 2}. The observable was measured with good statistical precision over a large range of z, P{sub T}, x{sub B}, and Q{sup 2}, 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 {pi}{sup -} sin{phi} Moment.},
doi = {10.1103/PhysRevD.89.072011},
url = {https://www.osti.gov/biblio/1127340},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 07,
volume = 89,
place = {United States},
year = {Tue Apr 01 00:00:00 EDT 2014},
month = {Tue Apr 01 00:00:00 EDT 2014}
}