Our previous studies revealed evidence of the strange molecular partners of $P_c$ states, $N\left(2080\right)3/2^{-}$ and $N\left(2270\right)3/2^{-}$, in $\gamma p\to K^{*+}{\mathrm{\Sigma }}^0/K^{*0}{\mathrm{\Sigma }}^{+}$ and $\gamma p\to \varphi p$ reactions. Motivated by the differential cross-section data for $\gamma p\to K^{+}{\mathrm{\Sigma }}^0$ from CLAS 2010, which exhibits some bump structures at $W\approx$ 1875, 2080, and 2270 MeV, we extend our previous analysis by investigating the effects of $N\left(1535\right)1/2^{-}$, $N\left(1875\right)3/2^{-}$, $N\left(2080\right)1/2^{-},\text{and}3/2^{-}$ and $N\left(2270\right)1/2^{-},3/2^{-},\text{and}5/2^{-}$ as strange partners of $P_c$ molecular states in the reactions $\gamma p\to K^{+}{\mathrm{\Sigma }}^0$ and $\gamma p\to K^0{\mathrm{\Sigma }}^{+}$. The theoretical model employed in this study utilizes an effective Lagrangian approach in the tree-level Born approximation. It contains contributions from the $s$ channel with exchanges of $N$, $\mathrm{\Delta }$, $N^{*}$ (including the hadronic molecules with hidden strangeness), ${\mathrm{\Delta }}^{*}$; $t$ channel; $u$ channel; and the generalized contact term. The results based on the final fitted parameters are in good agreement with all available experimental data of both cross sections and polarization observables for $\gamma p\to K^{+}{\mathrm{\Sigma }}^0$ and $\gamma p\to K^0{\mathrm{\Sigma }}^{+}$. Notably, the $s$-channel exchanges of molecules significantly contribute to the bump structures in cross sections for $\gamma p\to K\mathrm{\Sigma }$ at $W\approx 1900$, 2080, and 2270 MeV and show considerable coherence with contributions from $s$-channel exchanges of general resonances to construct the overall structures of cross sections. More abundant experiments, particularly for the reaction $\gamma p\to K^0{\mathrm{\Sigma }}^{+}$, are necessary to further strengthen the constraints on the theoretical models.

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• Particle phenomena
• Photon production
• Exotic baryons
• Hadrons
• Polarization