Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-06-09
Nucl.Phys.A677:241-312,2000
Physics
Nuclear Physics
Nuclear Theory
89 pages, 5 figures, submitted to Nucl. Phys. A (substantially revised version)
Scientific paper
10.1016/S0375-9474(00)00206-2
We present a new chiral expansion scheme for the nucleon-nucleon scattering amplitude which preserves unitarity exactly. Our effective field theory builds on the power counting rules for 2-nucleon reducible diagrams proposed in \cite{lutz}. We evaluate the leading order terms of the isospin one scattering amplitude and elaborate in detail on the $^1S_0$ phase shift. Our chiral description of the $^1S_0$-phase shift does compete in quality with modern phenomenological nucleon-nucleon potentials. We describe elastic and inelastic scattering quantitatively up to laboratory energies of $E_{\rm lab} \simeq 600$ MeV.
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