Effective boost and "point-form" approach

Details Effective boost and "point-form" approach Effective boost and "point-form" approach

2001-07-11

arxiv.org/abs/nucl-th/0107029v2

Phys.Rev. C65 (2002) 038202

Physics

Nuclear Physics

Nuclear Theory

revised version as accepted for publication

Scientific paper

10.1103/PhysRevC.65.038202

Triangle Feynman diagrams can be considered as describing form factors of states bound by a zero-range interaction. These form factors are calculated for scalar particles and compared to point-form and non-relativistic results. By examining the expressions of the complete calculation in different frames, we obtain an effective boost transformation which can be compared to the relativistic kinematical one underlying the present point-form calculations, as well as to the Galilean boost. The analytic expressions obtained in this simple model allow a qualitative check of certain results obtained in similar studies. In particular, a mismatch is pointed out between recent practical applications of the point-form approach and the one originally proposed by Dirac.

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