Skip to main content
Log in

Preon model with three SU3 hypercolours and three SU5 hyperflavours

  • Published:
Il Nuovo Cimento A (1965-1970)

Summary

From ‘vertical’ preons V with SU5 V-5, ‘horizontal’ preons H with SU5 H -5 and « techni »-preons T withSU 5 T- 5, where eachSU 5 gauge group is broken asSU 5 → SU3 xSU 2 X U1 at λGUT ~ 1015 GeV, we obtain a set of massless composite fermions which satisfies ’t Hooft’s anomaly matching conditions at an energy scale λHC ~ 106 GeV, where SU3XSU3XSU 3 ]-hypercolours become strong. Then, at λSTC ~ 104 GeV, where [SU 2XSU 2 ]- supertechnicolours become strong, we obtain quarks and leptons fL = (5 + 10, 3, 1)L and technifermions FR = (5 + 10, 1, 3)R of SU5,VXSU3,HXSU3,TC as three-preon states (VHH) + (VVH) and (VTT) + (VVT), respectively. TechnicolourSU 3,TC is broken intoSO 3,TC at λSTC and it becomes strong at λTC ~ 102 GeV. The condensate of the technifermionsF R, < F CL FR>, provides reasonable quark and lepton masses.

Riassunto

Dai preoni « verticali » V conSU 5 V-5, i preoni « orizzontali » H conSU 5,H-5 e tecnipreoni T conSU 5,T-5, dove ogni gruppo di gaugeSU 5 si rompe inSU 3 XSU 2 X U1 per λGUT ~ 1015 GeV, si ottiene un insieme di fermioni composti privi di massa che soddisfa le condizioni di adattamento dell’anomalia di ’t Hooft ad una scala d’energia λHC ~ ~ 106 GeV, dove gli ipercolori [SU 3 XSU 3 XSU 3 ] diventano forti. Allora, per λSTC~ ~ 104 GeV, dove i supertecnicolori [SU 2 XSU 2 ] diventano forti, otteniamo quark e leptoni fL= (5+ 10, 3, 1)L e tecnifermioni FR= (5+ 10, 1, 3)R diSU 5,V XSU 3,H XSU 3,TC come stati a tre preoni (VHH) + (VVH) e (VTT) + (VTT), rispettivamente. II tecnicolore diSU 3,TC si rompe inSO 3,TC per λSTC e diventa forte per λTC ~ 102 GeV. II condensate di teonifermioniF R, <F CL FR> fornisce accettabili masse dei quark e dei leptoni.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. H. Geoegi andS. L. Glashow:Phys. Rev. Lett.,32, 438 (1974).

    Article  ADS  Google Scholar 

  2. Y. Koide:Lett. Nuovo Cimento,43, 97 (1985).

    Article  Google Scholar 

  3. Y. Koide:Lett. Nuovo Cimento,44, 149 (1985);Nuovo Cimento A,91, 181 (1986).

    Article  Google Scholar 

  4. K. Akama andH. Terazawa: University of Tokyo, report No. 257 (1976) (unpub- lished);T. Maehaea andT. Yanagida:Prog. Theor. Phys.,60, 822 (1978);F. Wilczek andA. Zee:Phys. Rev. Lett.,42, 421 (1979);A. Davidson, M. Koca andK. C. Wali:Phys. Rev. D,20, 1195 (1979);J. Chakrabarti:Phys. Rev. D,20, 2411 (1979).

  5. E. Cazalbuoni andE. Catto:Phys. Lett. B,93, 47 (1980).

    Article  ADS  Google Scholar 

  6. Y. Tosa andE. E. Marshak:Phys. Rev. D,27, 616 (1983).

    Article  ADS  Google Scholar 

  7. S. Weinberg andE. Witten:Phys. Lett. B,96, 59 (1980);T. Kugo:Phys. Lett. B,109, 205 (1982).

    Article  MathSciNet  ADS  Google Scholar 

  8. MARK J Collaboration:Phys. Lett. B,152, 439 (1985). For recent report on the search for heavy quarks, see,e.g., JADE Collaboration:Phys. Lett. B,160, 337 (1985).

    Article  Google Scholar 

  9. S. Dimopulos andL. Susskind:Nucl. Phys. B,155, 237 (1979);E. Eichten andK. D. Lane:Phys. Lett. B,90, 125 (1980). Also see, for techni- preons,e.g., C. H. Albright, B. Schrempp and F. Schrempp:Phys. Rev. D,26, 1737 (1982);K. Yamawaki andT. Yokota:Phys. Lett. B,113, 293 (1982);Nucl. Phys. B,223, 144 (1983).

    Article  ADS  Google Scholar 

  10. For example,H. Georgi:Nucl. Phys. B,156, 126 (1977).

    Article  MathSciNet  ADS  Google Scholar 

  11. Gr. ’T Hooft: inRecent Developments in Gauge Theories, Proceedings of the NATOAdvanced Study Institute, Cargèse, 1979, edited by G. ’T Hooftet al.(Plenum Press, New York, N. T., 1980).

    Google Scholar 

  12. H. Georgi andJ. Preskill:Phys. Lett. B,156, 369 (1985).

    Article  ADS  Google Scholar 

  13. S. Raby, S. Dimopoulos andL. Susskind:Nucl. Phys. B,219, 373 (1980).

    Article  MathSciNet  ADS  Google Scholar 

  14. B. Holdom:Phys. Rev. D,24, 1441 (1981). Also see, for application to composite models,e.g., K. Yamawaki and T. Yokota:Phys. Lett. B,113, 293 (1982);Nucl. Phys. B,223, 144 (1983);C. H. Albright:Phys. Rev. D,29, 2595 (1984).

    Article  ADS  Google Scholar 

  15. R. D. Peccei andH. E. Quinn:Phys. Rev. Lett.,38, 1440 (1977);Phys. Rev. D,16, 1701 (1977);S. Weinberg:Phys. Rev. Lett.,40, 233 (1978);F. Wilczek:Phys. Rev. Lett.,40, 279 (1978).

    Article  ADS  Google Scholar 

  16. For example, Mark J Collaboration (B. Adeva et al.):Phys. Rev. Lett.,54, 1750 (1985).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Koide, Y. Preon model with three SU3 hypercolours and three SU5 hyperflavours. Nuov Cim A 95, 160–172 (1986). https://doi.org/10.1007/BF02903039

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02903039

PACS

Navigation