Inclusive K+ and exclusive K+Y photoproduction on the deuteron: Lambda- and Sigma-threshold phenomena - art. no. 014001

Inclusive K+ and exclusive K+Y photoproduction on the deuteron are investig ated theoretically. Modem hyperon-nucleon forces and a recently updated kao n photoproduction operator for the gamma + N --> K+ + Y process are used. S izable effects of the hyperon-nucleon final state interaction are found nea r the K(+)Lambda N and K(+)Sigma N thresholds in the inclusive reaction. An gular distributions for the exclusive process show clear YN fnal state inte raction effects in certain kinematic regions. Precise data especially for t he inclusive process around the K(+)Sigma N threshold would help to clarify the strength and property of the Lambda N-Sigma N interaction.