4 papers
"Point-form" estimate of the pion form factor revisited
B. Desplanques, A. Amghar, L. Theussl
The pion form factor calculation in the ``point-form'' of relativistic quantum mechanics is re-considered. Particular attention is given to the relation between the momentum of the…
Comparison of Different Boost Transformations for the Calculation of Form Factors in Relativistic Quantum Mechanics
L. Theussl, A. Amghar, B. Desplanques +1
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…
Validity of the one-body current for the calculation of form factors in the point form of relativistic quantum mechanics
B. Desplanques, L. Theußl
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 o…
Scalar meson exchange and the baryon spectra
P. Stassart, Fl. Stancu, J. -M. Richard
We explore the role of a scalar meson exchange interaction between quarks in a semirelativistic constituent quark model where the quarks are subject to a linear confinement. We sea…