Nucleon-nucleon partial-wave analysis to 1.6 GeV

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 $pp\left(18\mathrm{} np\right)$ 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 ${}_{}{}^3{}_{}{}^{}P_2^{}{}_{}{}^{}-{}_{}{}^3{}_{}{}^{}F_2^{}{}_{}{}^{}$ 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.