Validity of the one-body current for the calculation of form factors in the point form of relativistic quantum mechanics

Details Validity of the one-body current for the calculation of form factors in the point form of relativistic quantum mechanics Validity of the one-body current for the calculation of form factors in the point form of relativistic quantum mechanics

2001-02-27

arxiv.org/abs/nucl-th/0102060v1

Eur.Phys.J. A13 (2002) 461-469

Physics

Nuclear Physics

Nuclear Theory

11 pages, 1 eps figure

Scientific paper

Form factors are calculated in the point form of relativistic quantum mechanics for the lowest energy states of a system made of two scalar particles interacting via the exchange of a massless boson. They are compared to the exact results obtained by using solutions of the Bethe-Salpeter equation which are well known in this case (Wick-Cutkosky model). Deficiencies of the point-form approach together with the single-particle current are emphasised. They point to the contribution of two-body currents which are required in any case to fulfil current conservation.

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