Quantitative studies of the homogeneous Bethe-Salpeter equation in Minkowski space
Quantitative studies of the homogeneous Bethe-Salpeter equation in Minkowski space
The Bethe-Salpeter equation for a bound system, composed by two massive scalars exchanging a massive scalar, is quantitatively investigated in ladder approximation, within the Nakanishi integral representation approach. For the S-wave case, numerical solutions with a form inspired by the Nakanishi integral representation are calculated. The needed Nakanishi weight functions …