Nucleon-nucleon partial-wave analysis to 1.6 GeV

Abstract

An energy-dependent analysis and set of energy-independent analyses are presented for the nucleon-nucleon elastic-scattering data below 1.6 GeV. The database from which the energy-dependent and 25 $pp(18 np)$ single-energy solutions are obtained consists of 11 880 $\mathrm{pp}$ and 7572 $\mathrm{np}$ data. A resonancelike structure is found to occur in the $^{1}D_{2}$, $^{3}F_{3}$, and $^{3}P_{2}\ensuremath{-}^{3}F_{2}$ partial waves; this behavior is associated with poles in the complex energy plane. The pole positions and residues are obtained through analytic continuation of the "production" piece of the $T$ matrix obtained in the energy-dependent solution.