- Physical Review Journals
All JournalsPhysics Magazine
Access Provided by Xinjiang University

Physical Review D

Export citation

Export citation

Choose format for download:

Download Citation
  • Access by Xinjiang University

Extra fermions in E6 superstring theories

V. Barger

N. G. Deshpande

R. J. N. Phillips

K. Whisnant

  • Physics Department, University of Wisconsin, Madison, Wisconsin 53706

  • Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403

  • Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, England

  • Physics Department, Florida State University, Tallahassee, Florida 32306

PDF

Phys. Rev. D 33, 1912 – Published 1 April, 1986Erratum Phys. Rev. D 35, 1741 (1987)

DOI: https://doi.org/10.1103/PhysRevD.33.1912

Abstract

In E6 superstring theories, there are new fermion fields which lie in the 27-dimensional representation along with the known fermions. We examine possible production modes of these exotic fermions and their likely decays. Whereas e+e− collider data exclude new charged fermions with masses below 23 GeV, it appears that present pp¯ collider data for dimuons and for isolated single electrons exclude exotic quarks with masses below 30 GeV and considerable regions of lepton mass assignments in the range 20–45 GeV (assuming &). We place constraints on the mixings of the exotic fermions from experimental limits on flavor-changing neutral currents and the observed weak universality of charged-current interactions. The decays of the exotic h quark (singlet, charge -(1/3)) satisfy the bound Γ(h→de+e−)/Γ(h→ueν)≳12%. Production and decays of very heavy exotics are also considered.

View figure in article

Erratum

Erratum: Extra fermions in E6 superstring theories

V. Barger, N. G. Deshpande, R. J. N. Phillips, and K. Whisnant
Phys. Rev. D 35, 1741 (1987)

References (29)

  1. E. Witten, Phys. Lett. 155, 151 (1985); Nucl. Phys. 258, 75 (1985).
  2. P. Candelas, G. T. Horowitz, A. Strominger, and E. Witten, Nucl. Phys. 258, 46 (1985).
  3. J. D. Breit, B. A. Ovrut, and G. Segré, Phys. Lett. 158, 33 (1985).
  4. A. Sen, Phys. Rev. Lett. 55, 33 (1985).
  5. P. Binétruy, S. Dawson, I. Hinchliffe, and M. Sher, Lawrence Berkeley Laboratory Report No. 203173, 1985 (unpublished).
  6. J. Rosner, Enrico Fermi Institute Report No. EFI 85-34, 1985 (unpublished).
  7. E. Cohen, J. Ellis, K. Enquist, and D. V. Nanopoulos, Phys. Lett. 165, 76 (1985).
  8. R. Robinett, University of Massachusetts Report No. UMHEP-239, 1985 (unpublished).
  9. S. M. Barr, Phys. Rev. Lett. 55, 2778 (1985).
  10. L. S. Durkin and P. Langacker, University of Pennsylvania Report No. UPR-0287-T, 1985 (unpublished).
  11. V. Barger, N. G. Deshpande and K. Whisnant, Phys. Rev. Lett. 56, 30 (1986).
  12. S. Glashow and S. Weinberg, Phys. Rev. D 15, 1958 (1977); E. Paschos, ibid. 15, 1966 (1977).
  13. V. Barger and S. Pakvasa, Phys. Lett. 81, 195 (1979); V. Barger, W.-Y. Keung, and R. J. N. Phillips, Phys. Rev. D 24, 1328 (1981).
  14. G. Kane and M. Peskin, Nucl. Phys. 195, 29 (1982).
  15. F. J. Gilman and S. H. Rhie, Phys. Rev. D 32, 324 (1985).
  16. R. Thun, Phys. Lett. 134, 459 (1985).
  17. C. Akerlof, Phys. Lett. 156, 271 (1985); G. J. Feldman et al., Phys. Rev. Lett. 54, 2289 (1985); W. W. Ash et al., ibid. 54, 2477 (1985).
  18. G. J. Feldman, Report No. SLAC-PUB-3684, 1985 (unpublished).
  19. V. Barger, W.-Y. Keung, and R. J. N. Phillips, Phys. Lett. 141, 126 (1984).
  20. G. Arnison et al.., Phys. Lett. 147 B vec, 493 (1984); A. Norton, in Proceedings of the New Particles '85 Conference, Madison, Wisconsin, 1985 (unpublished); C. Rubbia, in Proceedings of the 1985 International Symposium on Lepton and Photon Interactions at High Energies, Kyoto (Research Institute for Fundamental Physics, Kyoto University, Kyoto, 1985).
  21. G. Arnison et al.., Phys. Lett. 155 B vec, 442 (1985); K. Eggert, in Proceedings of the New Particles '85 Conference, Madison, Wisconsin, 1985 (unpublished); C. Rubbia (Ref. 20).
  22. G. Arnison et al.., Phys. Lett. 139 B vec, 115 (1984); C. Rubbia (Ref. 20).
  23. V. Barger and R. J. N. Phillips, Phys. Rev. Lett. 55, 2752 (1985).
  24. D. W. Duke and J. F. Owens, Phys. Rev. D 30, 49 (1984).
  25. V. Barger, J. Ohnemus, and R. J. N. Phillips (in preparation).
  26. J. R. Cudell, F. Halzen, and K. Hikasa, Phys. Lett. 157, 447 (1985); S. D. Ellis, R. Kleiss, and W. J. Stirling, ibid. 158 B vec, 341 (1985); P. Aurenche and R. Kinnunen, Z. Phys. C 28, 261 (1985).
  27. G. L. Kane, W. W. Repko, and W. B. Rolnick, Phys. Lett. 148, 367 (1984).
  28. V. Barger, H. Baer, K. Hagiwara, and R. J. N. Phillips, Phys. Rev. D 30, 947 (1984).
  29. M. Gronau, C. N. Leung and J. L. Rosner, Phys. Rev. D 29, 2539 (1984).

Outline

Information

Phys. Rev. D 33, 1912– Published 1 April, 1986
  • Received 4 December 1985

© 1986 American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation