Measurement of the Electron-Deuteron Elastic-Scattering Cross Section in the Range0.8<~q2<~6GeV

Abstract

We report preliminary results of elastic e-d scattering at large momentum transfer performed at the Stanford Linear Accelerator Center with use of two high-re solution spectrometers in coincidence. Our results are in sharp disagreement with the mesonexchange calculations, they are in rough agreement with the nonrelativistic potential models, and they are in agreement with the predictions of the quark dimensional-scaling model which pictures the deuteron as a bound state of six quarks at large momentum transfer.

Phenomenology of the deuteron electromagnetic form factors

“…The analyses presented in [22,26] need to be updated, because of new t 20 [21,23,25] and A [2,4] data. In particular, the parameterization of A used in [26] gave a very small weight to the then only existing high Q data [5] and is lower than the new data [2,4] around 4.5 fm −1 . Furthermore, we present here a more compact solution and a more rigorous treatment of errors.…”

“…The three paramaterizations described below are determined through a χ 2 minimization involving 269 cross section data points [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and 39 polarization data points [21][22][23][24][25][26][27][28][29]. In most polarization data, and in some cross section data, the systematic uncertainties are dominant and may vary from point to point in a given experiment.…”

Measurement of the deuteron elastic structure functions at large momentum transfers

“…The measurement of A(Q 2 ) at low momentum transfers (below 2 (GeV/c) 2 ) was motivated by the apparent disagreement between the SLAC A(Q 2 ) data [3] and the data from Saclay [7], CEA [8] and Bonn [9] in the region where they overlap, which is illustrated in Figure 2. Prior to this experiment, the deuteron A(Q 2 ) structure function had been measured out to a maximum momentum transfer squared of Q 2 = 4 (GeV/c) 2 in SLAC Experiment E101 ( Figure 3).…”

“…The analysis method is discussed in 2 . Shown are data from experiments performed at SLAC [3], Saclay [7], CEA [8] and Bonn [9]. Shown are data from experiments performed at SLAC [3], Saclay [7], CEA [8] and Bonn [9].…”

“…References [3] and [4]), but these predictions usually have to be augmented with corrections (such as relativistic corrections and meson exchange current (MEC) contributions) in order to describe the available data. Relativistically, the deuteron wave function can be derived from realistic NN interaction models via solution of the Bethe-Salpeter and related quasipotential equations [5].…”