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

Abstract : 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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Submitted on : Monday, May 27, 2002 - 1:29:26 PM
Last modification on : Thursday, November 19, 2020 - 12:58:37 PM

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B. Desplanques, L. Theussl. Validity of the one-body current for the calculation of form factors in the point form of relativistic quantum mechanics. European Physical Journal A, EDP Sciences, 2002, 13, pp.461-469. ⟨in2p3-00011632⟩

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