We describe five different ways of obtaining the Salpeter formula for the plasma corrections to fusion rates; this formula is valid at the center of the sun with insignificant errors (∼percent). Several recent papers have obtained a variety of answers in conflict with this result. We analyse the arguments of these papers, identifying sources of the discrepancies in some cases, and pointing out ...

We investigate the relation between the rank I separable potential for the covariant Bethe-Salpeter equation and the one-boson-exchange potential. After several trials of the parameter choices, it turns out that it is not always possible to reproduce the phase-shifts calculated from a single term of the one-boson-exchange potential especially of the σ-exchange term, separately by the rank I sep...

A bstract The Bethe-Salpeter equation is a non-perturbative, relativistic and covariant description of two-body bound states. We derive the classical for two massive point particles (with or without spin) in gravitational system. This recursion relation which involves two-massive-particle-irreducible diagrams space amplitudes, defined by quotienting out symmetrization over internal graviton exc...