2003/01/17 by L. Theussl, A. Amghar, B. Desplanques +1
Physics and Astronomy · #hep-ph
published as Few Body Syst.Suppl. 14 (2003) 393 · Invited talk given at the 18th European Conference on Few-Body Problems in Physics, Bled, Slovenia, 8-14 Sep 2002. Submitted to Few Body Syst.Suppl
arxiv created 2003/01/17 · arxiv updated 2009/11/30
The effect of different boost expressions, pertinent to the instant, front and point forms of relativistic quantum mechanics, is considered for the calculation of the ground-state form factor of a two-body system in simple scalar models. Results with a Galilean boost as well as an explicitly covariant calculation based on the Bethe-Salpeter approach are given for comparison. It is found that the present so-called point-form calculations of form factors strongly deviate from all the other ones. This suggests that the formalism which underlies them requires further elaboration. A proposition in this sense is made.