Analysis of the new Crystal Ball data on $K^{-}p\to {\pi }^0\mathrm{\Lambda }$ reaction with beam momenta of $514\sim 750$ MeV/$c$

The Crystal Ball Collaboration has recently reported the differential cross sections and $\mathrm{\Lambda }$ polarization for the reaction $K^-p\rightarrow \pi^0\Lambda$usinganincident$K^-$ beam with momenta between 514 and 750 MeV/$c$. We make a partial wave analysis for this process with an effective Lagrangian approach and study the properties of some $\mathrm{\Sigma }$ resonances around this energy range. With the inclusion of the 4-star resonances $\mathrm{\Sigma }(1189)$, ${\mathrm{\Sigma }}^{\ast }(1385)$, $\mathrm{\Sigma }(1670){\frac{3}{2}}^{-}$, $\mathrm{\Sigma }(1775){\frac{5}{2}}^{-}$, as well as a $\mathrm{\Sigma }(1635){\frac{1}{2}}^{+}$, which is compatible with the 3-star $\mathrm{\Sigma }(1660){\frac{1}{2}}^{+}$ in PDG, our results can well reproduce the experimental data. The parameters on the $\mathrm{\Sigma }$ resonances and related couplings are studied.