Towards a Grand Unified Theory of Four Generations

  • Pei-you Xue


We know that there are four fundamental interactions in nature: (a) Gravity; (b) Weak; (c) Electromagnetic; and (d) Strong (where QCD applies). The Glashow-Salam-Weinberg SU(2) × U(1) model is a unified theory of electro-weak interactions, i.e., (b) and (c) together. A Grand Unified Theory (GUT) attempts to unify (b), (c) and (d). The success of the GSW model and the progress of QCD leads people to expect that strong and electro-weak interactions will ultimately be unified. Various grand unified models have been proposed among which SU(5) and SO(10) are the most elegant. There are two problems still unresolved: the unification of generations and the gauge heirarchy problem. In this article we will present some attempts to solve the second problem.


Higgs Boson Yukawa Coupling Gauge Field Spinorial Representation Neutral Current 
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  1. 1.
    J.C. Pati and A. Salam, Phys. Rev. Lett., 31, 661 (1973).CrossRefGoogle Scholar
  2. 2.
    H. Georgi and S.L. Glashow, Phys. Rev. Lett., 32, 438 (1974).CrossRefGoogle Scholar
  3. 3.
    S.L. Glashow, Nucl. Phys., 22, 579 (1961);CrossRefGoogle Scholar
  4. S. Weinberg, Phys. Rev. Lett., 19, 1264 (1967);CrossRefGoogle Scholar
  5. A. Salam, Proceedings of the 8th Nobel Symposium Stockholm 1968, ed. by N. Svartholm, p. 367.Google Scholar
  6. 4.
    J.C. Pati and A. Salam, Phys. Rev., D10, 275 (1974);Google Scholar
  7. H. Fritzsch and P. Minkowski, Ann. Phys., 93, 193 (1975);CrossRefGoogle Scholar
  8. H. Fritzsch and P. Minkowski, Nucl. Phys., B103, 61;Google Scholar
  9. H. Georgi, Particles and Fields, 1974 (APS/DPF Williamsburg), ed. by C.E. Carlson ( AIP, New York, 1975 ), p. 575;Google Scholar
  10. S.L. Glashow, HUTP-77/A005 (1977).Google Scholar
  11. 5.
    H. Georgi, Nucl. Phys., B156, 126 (1979).CrossRefGoogle Scholar
  12. 6.
    R. Barbieri and D.V. Nanopoulos, Ref.TH. 2810-CERN (1980).Google Scholar
  13. 7.
    J. Banks and H. Georgi, Phys. Rev., D14, 1159 (1976).Google Scholar
  14. 8.
    H. Georgi, H.R. Quinn and S. Weinberg, Phys. Rev. Lett., 33, 451 (1974).CrossRefGoogle Scholar
  15. 9.
    D.P. Barber et al., MIT Report No. 110 (1980).Google Scholar
  16. 10.
    D.P. Barber et al., “The first year of Mark-J at PETRA” (1980).Google Scholar
  17. 11.
    J. Kirkby, Proc. of the 1979 International Symposium on Lepton and Photon Interaction at High Energies, Batavia, 1979, SLAC-PUB-2419.Google Scholar
  18. 12.
    K.C. Chou and C.S. Gao, SLAC-PUB-2445 (1979).Google Scholar
  19. 13.
    S. Okubo, Phys. Rev., D16, 3528 (1977).Google Scholar
  20. 14.
    H. Georgi and D.V. Nanopoulos, Phys. Lett., 82B, 392 (1979).Google Scholar
  21. 15.
    H. Georgi, HUTP 79/A013(199).Google Scholar
  22. 16.
    D.P. Barber et al., “The first year of Mark J at PETRA” (1980).Google Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Pei-you Xue
    • 1
  1. 1.Institute of High Energy PhysicsAcademia SinicaChina

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