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We show that the hierarchically small mu term in supersymmetric theories is aconsequence of two identical pairs of Higgs doublets taking a democratic formfor their mass matrix. We briefly discuss the discrete symmetry S2xS2 towardthe democratic mass matrix. Then, we show that there results an approximatePeccei-Quinn symmetry and hence the value mu is related to the axion decayconstant.

Natural Higgs-flavor-democracy solution of the mu problem of supersymmetry and the QCD axion