Quarks, Leptons as Fermion-Boson Composite Objects and Flavor-Mixings by Substructure Dynamics

A fermion-boson-type composite model for quarks and leptons is proposed. Elementary fields are only one kind of spin-1/2 and spin-0 preon. Both are in the global supersymmetric pair with the common electric charge of “e/6” and belong to the fundamental representations of (3,2,2) under the spontaneously unbroken SU(3)C ⊗ SU(2)L ⊗ SU(2)R gauge symmetry induced necessarily by the concept of “Cartan connection” equipped with “Soldering Mechanism”. Preons are composed into subquarks which are “intermediate clusters” towards quarks and leptons. The mechanism of making higher generations is obtained by adding neutral scalar subquark composed of a preon-antipreon pair in the 3-state of SU(2)L,R. This model predicts the CKM matrix elements : |Vts| = 2.6 × 10−2, |Vtd| = 1.4 × 10−3; the neutral pseudoscalar meson mass differences : ∆MD ≈ 10−14 GeV, ∆MBs ≈ 10−11 GeV, ∆MTu ≈ 10(−10∼−9) GeV and ∆MTc ≈ 10(−8∼−7) GeV; the phases of CP violation : θK = θD = θBs = θTc ≃ (1/2)θBd ≃ (1/2)θTu . PACS: 12. 15. Ff; 12. 60.-i; 12. 60. Rc. Keyword: quark-flavor-mixing; beyond the standard model; composite model. ∗ † e-mail : [email protected]