STRUCTURE FORMATION WITH MAJORON SUPERMULTIPLET

We show that the late-decaying particle scenario may be realized in th e supersymmetric singlet majoron model with the majoron scale 10-200 T eV. The smajoron decaying into two neutrinos is the late-decaying part icle with the mass 0.1-1 TeV and the life-time 2 x 10(3)-8 x 10(4) sec onds. The lower limit of the majorino mass is 4-40 TeV in order to avo id the overclosure of the universe due to the decay-produced LSP. The muon neutrino and the tau neutrino can be used to explain the atmosphe ric and the solar neutrino deficit.