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Unification, multiplets, and proton decay

Tuhin Roy*

  • Physics Department, Boston University, Boston, Massachusetts 02215, USA

  • *Electronic address: tuhin@physics.bu.edu
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Phys. Rev. D 71, 035010 – Published 14 February, 2005

DOI: https://doi.org/10.1103/PhysRevD.71.035010

Abstract

We make a detailed analysis of gauge-coupling unification in supersymmetry. When the standard model gauge group is embedded in a grand unified theory (GUT), new particles often appear below the GUT scale in order to predict the right phenomenology at low-energy. While these new particles are beyond the reach of accelerator experiments, they change the prediction of αs. Here we classify all the (SU(3)C,SU(2)L)U(1)Y representations which improve or worsen the prediction. Running experimentally determined values of the coupling constants at two loops we calculate the allowed range of masses of fields in these representations. We explore the implication of these results in SU(5) and SU(3)3 (trinification) models. We discover that minimal trinification predicts light triplet Higgs particles which lead to proton decay with a lifetime in the vicinity of the current experimental bound.

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References (25)

  1. K. Tobe and J. D. Wells, Phys. Lett. B 588, 99 (2004).
  2. J. Hisano, H. Murayama, and T. Yanagida, Phys. Rev. Lett. 69, 1014 (1992).
  3. J. Hisano, T. Moroi, K. Tobe, and T. Yanagida, Mod. Phys. Lett. A 10, 2267 (1995).
  4. J. Hisano, Y. Nomura, and T. Yanagida, Prog. Theor. Phys. 98, 1385 (1997).
  5. H. Murayama and A. Pierce, Phys. Rev. D 65, 055009 (2002).
  6. S. L. Glashow, Boston U., Print-84-0577; in Proceedings of the Fifth Workshop on Grand Unification (World Scientific, Singapore, 1984).
  7. G. Lazarides and C. Panagiotakopoulos, Phys. Lett. B 336, 190 (1994).
  8. G. R. Dvali and Q. Shafi, Phys. Lett. B 326, 258 (1994).
  9. G. R. Dvali and Q. Shafi, Phys. Lett. B 339, 241 (1994).
  10. G. R. Dvali and Q. Shafi, in Proceedings of the ICTP Summer School in High-Energy Physics and Cosmology, Trieste, Italy, 1996 (World Scientific, Singapore, 1997), pp. 523–553.
  11. S. Willenbrock, Phys. Lett. B 561, 130 (2003).
  12. J. E. Kim, Phys. Lett. B 591, 119 (2004).
  13. V. D. Barger, M. S. Berger, and P. Ohmann, Phys. Rev. D 47, 1093 (1993).
  14. I. Dorsner, Phys. Rev. D 69, 056003 (2004).
  15. Particle Data Group Collaboration, S. Eidelman et al., Phys. Lett. B 592, 1 (2004).
  16. W. de Boer and C. Sander, Phys. Lett. B 585, 276 (2004).
  17. J. Erler and P. Langacker, Phys. Lett. B 592, 1 (2004).
  18. S. P. Martin and M. T. Vaughn, Phys. Lett. B 318, 331 (1993).
  19. I. Antoniadis, C. Kounnas, and K. Tamvakis, Phys. Lett. B 119, 377 (1982).
  20. B. Bajc, P. F. Perez, and G. Senjanovic, Phys. Rev. D 66, 075005 (2002).
  21. B. Bajc, P. F. Perez, and G. Senjanovic, hep-ph/0210374.
  22. R. Slansky, Phys. Rep. 79, 1 (1981).
  23. K. Kobayashi, in Proceedings of SUSY 04.
  24. G. Lazarides and C. Panagiotakopoulos, Phys. Rev. D 51, 2486 (1995).
  25. J. E. Kim, in Proceedings of the String Phenomenology Workshop, Durham, England, 2003.

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Phys. Rev. D 71, 035010– Published 14 February, 2005
  • Received 4 September 2004

© 2005 American Physical Society

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