Measurement of the parity violating asymmetry in the quasielastic electron-deuteron scattering and improved determination of the magnetic strange form factor and the isovector anapole radiative correction
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PhysRevD.94.051101.pdf
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Author(s)
Balaguer Ríos, D.
Aulenbacher, K.
Baunack, S.
Diefenbach, J.
Gläser, B.
von Harrach, D.
Imai, Y.
Kabuß, E.-M.
Kothe, R.
Lee, J. H.
Date Issued
September 2016
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Balaguer Ríos, D., et al. “Measurement of the Parity Violating Asymmetry in the Quasielastic Electron-Deuteron Scattering and Improved Determination of the Magnetic Strange Form Factor and the Isovector Anapole Radiative Correction.” Physical Review D, vol. 94, no. 5, Sept. 2016. © 2016 American Physical Society
Version
Final published version
Abstract
A new measurement of the parity-violating asymmetry in the electron-deuteron quasielastic scattering for backward angles at ⟨Q[superscript 2]⟩=0.224 (GeV/c)[superscript 2], obtained in the A4 experiment at the Mainz Microtron accelerator (MAMI) facility, is presented. The measured asymmetry is A[subscript PV][superscript d]=(-20.11±0.87[subscript stat]±1.03[subscript sys])×10[superscript -6]. A combination of these data with the proton measurements of the parity-violating asymmetry in the A4 experiment yields a value for the effective isovector axial-vector form factor of G[subscript A][superscript e,(T=1)]=-0.19±0.43 and R[subscript A][superscript e(T=1),anap] =-0.41±0.35 for the anapole radiative correction. When combined with a reanalysis of measurements obtained in the G0 experiment at the Thomas Jefferson National Accelerator Facility, the uncertainties are further reduced to G[subscript M][superscript s]=0.17±0.11 for the magnetic strange form factors, and R[subscript A][superscript (T=1),anap]=-0.54±0.26.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PHYSREVD.94.051101
