“…In closing this section, let us mention a few inconsistencies in this data set in the light of recent measurements. 1 The A(Q 2 ) Cambridge [87] and Bonn [94] data are very probably too low, since both recent measurements at Jefferson Lab [98,99] agree with the "higher" trend already given by the SLAC data [90]. Still, as apparent in Fig.…”
“…In closing this section, let us mention a few inconsistencies in this data set in the light of recent measurements. 1 The A(Q 2 ) Cambridge [87] and Bonn [94] data are very probably too low, since both recent measurements at Jefferson Lab [98,99] agree with the "higher" trend already given by the SLAC data [90]. Still, as apparent in Fig.…”
“…It also should be noted [34,30,37,39,27,47,45,25,24], for B(Q) to Refs. [38,34,30,43,46,40,47,35,29,28], and for T 20 (Q) to Refs. [51,52,49,53,54,59,55,56,57,60,58].…”
Abstract. Experimental form factors of the hydrogen and helium isotopes, extracted from an up-to-date global analysis of cross sections and polarization observables measured in elastic electron scattering from these systems, are compared to predictions obtained in three different theoretical approaches: the first is based on realistic interactions and currents, including relativistic corrections (labeled as the conventional approach); the second relies on a chiral effective field theory description of the strong and electromagnetic interactions in nuclei (labeled χEFT); the third utilizes a fully relativistic treatment of nuclear dynamics as implemented in the covariant spectator theory (labeled CST). For momentum transfers below Q 5 fm −1 there is satisfactory agreement between experimental data and theoretical results in all three approaches. However, at Q 5 fm −1 , particularly in the case of the deuteron, a relativistic treatment of the dynamics, as is done in the CST, is necessary. The experimental data on the deuteron A structure function extend to Q ≃ 12 fm −1 , and the close agreement between these data and the CST results suggests that, even in this extreme kinematical regime, there is no evidence for new effects coming from quark and gluon degrees of freedom at short distances.
“…The Bonn synchrotron also contributed to the world supply of electron-deuteron data [104]. Using two magnetic spectrometers, the reaction products were detected in coincidence at both forward and backward angles, in order to perform a selfconsistent Rosenbluth separation.…”
The charge and magnetic form factors of light nuclei, mainly for mass number A≤4, provide a sensitive test of our understanding of nuclei. A number of "exact" calculations of the wave functions starting from the nucleon-nucleon interaction are available. The treatment of two-body effects needed in the calculation of the electromagnetic form factors has made significant progress. Many electron scattering experiments have provided an extensive data base from which the various (mainly elastic) form factors can be extracted. This review discusses the data and the determination of the form factors, and compares them to the results of theory.
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