| The hyperon-nucleon (YN) interaction plays a key role in hypernuclei and strange nuclear matter and is an important part of the baryon-baryon interaction. While considerable progress has been made in the understanding of the nucleon-nucleon (NN) interaction in the past decades, we are still far from a complete understanding of the YN interaction. Some parameters of the YN potential can be obtained from the NN potential by using SU(3) symmetry. However, due to the broken SU(3) there are parameters, which must be obtained from fits to experimental data. High-statistics data on exclusive Lambda photoproduction off the deuteron initiated with highly-polarized photons offer unique opportunity to extract a large sample of polarization observables for final-state interaction events, which can be used to constrain hyperon-nucleon potentials. In this study, we determined the polarization transfers to the Lambda, Cx and Cz, from circularly polarized photons, and hyperon recoil polarization, Py, for final-state interactions (FSI) in the reaction gammad → K+Lambdan. Meanwhile, observables for the quasi-free mechanism were extracted for systematic studies and comparison to published CLAS results from the reaction gammap → K+Lambda. The data were taken with the CLAS detector at Thomas Jefferson National Accelerator Facility in the E06-103 experiment. Our results cover photon energies from 0.9 GeV to 2.6 GeV, the magnitude of K+ momentum up to 2 GeV/c2, the K + polar angle from 14° to 70°, the Lambda polar angle (relative to the three-momentum transfer to the Lambdan system) from 0° to 60°, and the Lambdan invariant mass from 2 GeV/c2 to 2.5 GeV/c2. The FSI results are the first ever obtained for observables and will provide stringent constraints on the theoretical models of the YN potential. |
