Speaker
Description
The Λ–n interaction plays a crucial role in achieving a comprehensive understanding of baryon–baryon interactions, including charge-symmetry breaking, as well as in understanding hypernuclear structure and the equation of state of dense baryonic matter, including neutron stars. However, its properties remain poorly constrained because direct Λ–n scattering experiments are extremely challenging. We investigate the Λ–n interaction through the final-state interaction (FSI) in the γd → K⁺Λn reaction. The Λn invariant-mass-dependent cross section has been measured with a tagged photon beam at energies from 1.5 to 2.4 GeV at the LEPS beamline of SPring-8. The Λn invariant-mass spectrum near threshold provides direct sensitivity to the Λ–n scattering amplitude, enabling constraints on the low-energy Λ–n interaction. We will present the current status of the analysis.