Relativistic effects in the electrodisintegration of deuterium

Abstract

The structure function RLT and the cross-section asymmetry A@ with respect to the direction of the momentum transfer in the reaction 'H(e, e'p) have been measured at a four-momentum transfer squared of 0.2 (GeV/c)', for missing momenta between 160 and 220 MeV/c at an invariant mass of 1050 MeV. For a proper description of these data calculations that include a relativistic form of the nucleon current operator are favoured. The absolute *H( e, e'p) cross-section data favour a covariant calculation over non-relativistic calculations with relativistic corrections.

The longitudinal response function of the deuteron in chiral effective field theory

“…[42][43][44], we use the Bonn-potential calculations of Arenhövel et al as a proxy for data. These calculations have been quite successful in describing data: non-L/T separated [45][46][47][48], L/T-separated [42][43][44], and even on the interference response functions, f LT and f T T [49][50][51][52][53][54][55], taken at many different laboratories over a wide range of relevant kinematic conditions. (Note that we do not list data at squared momentum transfers > 1 GeV 2 here because those are well outside the reach of χEFT, and even beyond the scope of the semi-relativistic treatment of Arenhövel et al.…”

H2(e,e′p)nReaction at High Recoil Momenta

“…Models which succeed under such stringent tests may then be applied with some confidence to infer aspects of the deuteron short-distance structure in the ''parallel kinematics'' configuration (i.e., protons detected alongq q ) where p r can be large while influences from FSI and two-body currents are expected to be minimized [7]. There is a substantial body of data for the 2 He; e 0 pn reaction, including cross-section measurements [8][9][10][11] as well as separations of various response functions [12][13][14][15][16][17][18][19][20][21] which differentiate between absorption of longitudinal and transverse photons. However, truly systematic studies of this reaction have been hindered by limitations of the various accelerators.…”

The f_LT Response Function of D(e,e'p)n at Q^2=0.33(GeV/c)^2

“…In-plane separations have been carried out at recoil momenta between 0 and 220 MeV/c and at lower Q 2 values at several laboratories and the published results can be found in references [11,12,13,14]. The momentum transfer dependence of f L , f T and f LT has been measured at Saclay for recoil momenta between 0 and 150 MeV/c [15].…”