Abstract
The electromagnetic form factors and low-energy observables of the deuteron are studied with the help of the light-front approach, where the deuteron is regarded as a weakly bound state of a proton and a neutron. Both the S and D wave interacting vertexes among the deuteron, proton, and neutron are taken into account. Moreover, the regularization functions are also introduced. In our calculations, the vertex and the regularization functions are employed to simulate the momentum distribution inside the deuteron. Our numerical results show that the light-front approach can roughly reproduce the deuteron electromagnetic form factors, like charge G0, magnetic G1, and quadrupole G2, in the low Q2 region. The important effect of the D wave vertex on G2 is also addressed.
Highlights
The study of deuteron properties, like its mass, binding energy, radius, and electromagnetic form factors, has been of great interest for many years, since it can encode the nature of nuclear effects and the nucleon–nucleon interaction
With S = 1, there are, three independent current matrix elements corresponding to the three conventional form factors, charge G0, magnetic G1, and quadrupole G2
The electromagnetic form factors and other low-energy observables of the deuteron are studied with the help of the light-front approach, where the deuteron is regarded as a weakly bound state of a proton and a neutron
Summary
The study of deuteron properties, like its mass, binding energy, radius, and electromagnetic form factors, has been of great interest for many years, since it can encode the nature of nuclear effects and the nucleon–nucleon interaction. We regard the deuteron as a weakly bound state of a proton and a neutron, and we do the numerical calculation in Minkowski space for the loop integral with the help of the light-front approach. For the S wave spin structure of the vertex among the deuteron, proton and neutron, we take the form proposed by Ref. A short summary is given in the last section
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