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
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.; Merkel, H.; Mora Espí, M. C.; Müller, U.; Schilling, E.; Weinrich, C.; Capozza, L.; Maas, F. E.; Arvieux, J.; El-Yakoubi, M. A.; Frascaria, R.; Kunne, R. A.; Ong, S.; van de Wiele, J.; Kowalski, Stanley B; Prok, Yelena; ... Show more Show less
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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.
Date issued
2016-09Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
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
ISSN
2470-0010
2470-0029