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- W1993399144 abstract "Different relativistic quantum-mechanic approaches have recently been used to calculate properties of various systems, form factors in particular. It is known that predictions, which most often rely on a single-particle current approximation, can lead to predictions with a very large range. It was shown that accounting for constraints related to space-time translations could considerably reduce this range. It is shown here that predictions can be made identical for a large range of cases. These ones include the following approaches: instant form, front form, and “point form” in arbitrary momentum configurations and a dispersion-relation approach which can be considered as the approach which the other ones should converge to. This important result supposes both an implementation of the above constraints and an appropriate single-particle-like current. The change of variables that allows one to establish the equivalence of the approaches is given. Some points are illustrated with numerical results for the ground state of a system consisting of scalar particles." @default.
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- W1993399144 date "2008-07-01" @default.
- W1993399144 modified "2023-10-18" @default.
- W1993399144 title "Form factors in RQM approaches: Constraints from space-time translations" @default.
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- W1993399144 doi "https://doi.org/10.1140/epja/i2008-10603-9" @default.
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