Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy region Eγ=1.1 –2.3 GeV

Zachariou, N.; Ilieva, Y.; Ivanov, N. Ya.; Sargsian, M. M.; Avakian, R.; Feldman, G.; Nadel-Turonski, P.

doi:10.1103/PhysRevC.91.055202

Title: Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy region Eγ=1.1 –2.3 GeV

Journal Article · Fri May 01 00:00:00 EDT 2015 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.91.055202· OSTI ID:1179441

Zachariou, N. ^[1]; Ilieva, Y. ^[2]; Ivanov, N. Ya. ^[3]; Sargsian, M. M. ^[4]; Avakian, R. ^[3]; Feldman, G. ^[5]; Nadel-Turonski, P. ^[6]

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.

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, Θ_c.m., between 25° and 160°. These are the first measurements of beam-spin asymmetries at Θ_c.m.=90° for photon-beam energies above 1.6 GeV, and the first measurements for angles other than Θ_c.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.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: CLAS Collaboration

Grant/Contract Number:: AC05-060R23177

OSTI ID:: 1179441

Alternate ID(s):: OSTI ID: 1179741

Report Number(s):: JLAB/PHY-15-2024; DOE/OR-23177-3326; PRVCAN; TRN: US1600818

Journal Information:: Physical Review C, Nuclear Physics, Vol. 91, Issue 5; ISSN 0556-2813

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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