Offshell effects in electromagnetic reactions on the deuteron

Details Offshell effects in electromagnetic reactions on the deuteron Offshell effects in electromagnetic reactions on the deuteron

2001-05-15

arxiv.org/abs/nucl-th/0105033v1

Nucl.Phys. A696 (2001) 556-580

Physics

Nuclear Physics

Nuclear Theory

22 pages revtex including 17 figures

Scientific paper

10.1016/S0375-9474(01)01135-6

Offshell contributions to the electromagnetic nuclear current are evaluated within a nonrelativistic approach by incorporation one-pion loop contributions in time-ordered perturbation theory. By construction, the correct experimental onshell properties of the nucleon current are ensured so that only the genuine offshell effects appear as model dependent. For a qualitative assessment of such offshell effects, this model is applied to photodisintegration of the deuteron for photon energies up to 500 MeV. While at low energies offshell contributions are small, above 300 MeV they lead to sizeable effects in observables up to about 30 percent pointing to the necessity of incorporating such effects if one aims at theoretical predictions of high precision.

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