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We investigate the hadronic reactions {\pi}N {\to} {\eta}N and {\pi}N {\to}K{\Lambda} via single-energy partial-wave analyses in the c.m. energy range1080 to 2100 MeV. Our results for the K{\Lambda} channel are consistent withprior works; however, for the {\eta}N channel our results differ significantlyfrom previous energy-dependent partial-wave analyses that violate the S-matrixunitarity. We present the first (new) results of {\eta}N and K{\Lambda}partial-wave amplitudes constrained by a unitary energy-dependent model. Weobtain excellent predictions of integrated cross sections for the two reactionsfrom a global energy-dependent solution. Our results imply that the region justabove S11 (1535) has a major contribution from P11 (1710) for {\pi}-p {\to}{\eta}n, whereas the large peak near 1700 MeV in {\pi}-p {\to} K0{\Lambda} isdominated by contributions from both S11 (1650) and P11 (1710).

Partial-wave analysis of {\pi}-p {\to} {\eta}n and {\pi}-p {\to} K0{\Lambda} reactions