Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy region Eγ=1.1 –2.3 GeV
Abstract
The beam-spin asymmetry, Σ, for the reaction γd→ΣΣpn has been measured using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility (JLab) for six photon-energy bins, between 1.1 and 2.3 GeV, and proton angles in the center-of-mass frame, Θc.m., between 25° and 160°. These are the first measurements of beam-spin asymmetries at Θc.m.=90° for photon-beam energies above 1.6 GeV, and the first measurements for angles other than Θc.m.=90°. The angular and energy dependence of Σ is expected to aid in the development of QCD-based models to understand the mechanisms of deuteron photodisintegration in the transition region between hadronic and partonic degrees of freedom, where both effective field theories and perturbative QCD cannot make reliable predictions.
- Authors:
-
- Univ. of South Carolina, Columbia, SC (United States); George Washington Univ., Washington, DC (United States)
- Univ. of South Carolina, Columbia, SC (United States)
- Yerevan Physics Inst. (YerPhI) (Armenia)
- Florida Intl Univ., Miami, FL (United States)
- George Washington Univ., Washington, DC (United States)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); George Washington Univ., Washington, DC (United States), et. al.
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Org.:
- CLAS Collaboration
- OSTI Identifier:
- 1179441
- Alternate Identifier(s):
- OSTI ID: 1179741
- Report Number(s):
- JLAB/PHY-15-2024; DOE/OR-23177-3326
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US1600818
- Grant/Contract Number:
- AC05-060R23177
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C, Nuclear Physics
- Additional Journal Information:
- Journal Volume: 91; Journal Issue: 5; Journal ID: ISSN 0556-2813
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Zachariou, N., Ilieva, Y., Ivanov, N. Ya., Sargsian, M. M., Avakian, R., Feldman, G., and Nadel-Turonski, P. Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy region Eγ=1.1 –2.3 GeV. United States: N. p., 2015.
Web. doi:10.1103/PhysRevC.91.055202.
Zachariou, N., Ilieva, Y., Ivanov, N. Ya., Sargsian, M. M., Avakian, R., Feldman, G., & Nadel-Turonski, P. Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy region Eγ=1.1 –2.3 GeV. United States. https://doi.org/10.1103/PhysRevC.91.055202
Zachariou, N., Ilieva, Y., Ivanov, N. Ya., Sargsian, M. M., Avakian, R., Feldman, G., and Nadel-Turonski, P. Fri .
"Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy region Eγ=1.1 –2.3 GeV". United States. https://doi.org/10.1103/PhysRevC.91.055202. https://www.osti.gov/servlets/purl/1179441.
@article{osti_1179441,
title = {Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy region Eγ=1.1 –2.3 GeV},
author = {Zachariou, N. and Ilieva, Y. and Ivanov, N. Ya. and Sargsian, M. M. and Avakian, R. and Feldman, G. and Nadel-Turonski, P.},
abstractNote = {The beam-spin asymmetry, Σ, for the reaction γd→ΣΣpn has been measured using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility (JLab) for six photon-energy bins, between 1.1 and 2.3 GeV, and proton angles in the center-of-mass frame, Θc.m., between 25° and 160°. These are the first measurements of beam-spin asymmetries at Θc.m.=90° for photon-beam energies above 1.6 GeV, and the first measurements for angles other than Θc.m.=90°. The angular and energy dependence of Σ is expected to aid in the development of QCD-based models to understand the mechanisms of deuteron photodisintegration in the transition region between hadronic and partonic degrees of freedom, where both effective field theories and perturbative QCD cannot make reliable predictions.},
doi = {10.1103/PhysRevC.91.055202},
journal = {Physical Review C, Nuclear Physics},
number = 5,
volume = 91,
place = {United States},
year = {Fri May 01 00:00:00 EDT 2015},
month = {Fri May 01 00:00:00 EDT 2015}
}
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