SPACE-TIME STRUCTURE AND UNIFIED THEORY

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Nature is believed to have concealed extra space beyond our familiar four dimensions and also the superspace for given supersymmetry. This project tried to find out this unrevealed spacetime structure by paying a particular attention to the Yukawa couplings that generate characteristic mass patterns of elementary particles, and made substantial progress towards their deeper understanding, for example, the geographical interpretation of the tri-bimaximal neutrino mixing, the unified treatment of particle generations based on the non-compact flavor group, and the mirage mediation of supersymmetry breaking.