Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-02-18
Chin.J.Phys.47:142-158,2009
Physics
Nuclear Physics
Nuclear Theory
Scientific paper
Within the relativistic quantum field theory, we analyze the differences between the $\pi N$ reaction models constructed from using (1) three-dimensional reductions of Bethe-Salpeter Equation, (2) method of unitary transformation, and (3) time-ordered perturbation theory. Their relations with the approach based on the dispersion relations of S-matrix theory are dicusssed.
Julia-Diaz Bruno
Kamano Hiroyuki
Lee T. S. -H.
Matsuyama Akihiko
Sato Takeshi
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