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The paper presents a first time attempt on a combined fit of the $K^{-}p$low-energy data and the $\pi\Sigma$ photoproduction mass spectra, performedwithout fixing the meson-baryon rescattering amplitudes to a specific$\pi\Sigma - \bar{K}N$ coupled channels model obtained from fitting exclusivelythe $K^{-}p$ data. The formalism adopted to describe the photoproductionprocess is based on chiral perturbation theory and employs a limited number offree parameters. The achieved description of the photoproduction massdistributions is not quite satisfactory, leaving a room for improving thephoto-kernel construction, but still provides additional constraints on thepositions of the $\Lambda(1405)$ poles. In particular, the presented modelstend to limit the mass of the lower pole and yield a larger width of the$\bar{K}N$ related pole at a higher mass.

Constraining the chirally motivated $\pi\Sigma$-$\bar{K}N$ models with the $\pi\Sigma$ photoproduction mass spectra