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- W1479919248 abstract "In the context of the Calabi-Yau string model we discuss the origin of characteristic pattern of quark-lepton masses and the CKM matrix. The discrete $R$-symmetry $Z_{2k+1} times Z_2$ is introduced and the $Z_2$ is assigned to the $R$-parity. The gauge symmetry at the string scale is broken into the standard model gauge group at an intermediate energy scale. At energies below the intermediate scale down-type quarks and also leptons are mixed with unobserved heavy states, respectively. On the other hand, there are no such mixings for up-type quarks. The large mixings between light states and heavy ones cause different mass pattern of leptons and down-type quarks from that of up-type quarks and yield a nontrivial CKM matrix for quarks but a trivial one for leptons. The mixing mechanism is illustrated using a two-generation toy model." @default.
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- W1479919248 date "1995-11-14" @default.
- W1479919248 modified "2023-09-23" @default.
- W1479919248 title "Quark-Lepton Masses and the Ckm Matrix in a String Inspired Model" @default.
- W1479919248 hasPublicationYear "1995" @default.
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