Strangeness Nuclear Physics Program at Tohoku University
Osamu Hashimoto (Tohoku University, Japan)

Following a brief description research activity on strangeness nuclear physics programs, which have been intensively carried out at KEK 12 GeV PS, JLab and J-PARC by Tohoku group using both hadronic and electron beams.
Our recent experiments to investigate the photo-production of neutral kaons and Lambda's on the neutron in the threshold region, which have been conducted at Research Center for Electron Photon Science (ELPH) of Tohoku University, will be presented. Such reaction is expected to offer valuable information that possibly differentiates the tree-level diagrams strangeness photo-production since the photon beam and the hadrons involved in the reaction are all uniquely neutral

Neutral kaons and \(\Lambda\)'s have been measured through the \(\pi ^+ \pi ^- (p \pi ^-)\) decay channel of \(K^0 (\Lambda)\) in the \(\gamma + d \rightarrow K^{0} + \Lambda (\Sigma^0)\) reaction in the energy region from 0.8 to 1.1 GeV using a liquid deuterium target and an internally-tagged photon beam at ELPH.
The data, which suggests a backward angular distribution of K 0S in the CM system, will be compared with recent theoretical studies such as isobar models.