Mirror Matter from a Unified Field Theory


A mirror world consisting of matter which interacts with ordinary matter via gravity and weakly via other forces has been considered, inter alia, as a model for dark matter. A discrete symmetry under the interchange of fields means that both sectors experience the same forces. Separately it has been shown that it is possible to unify gravitation and electromagnetism by using a degenerate metric in five dimensions; in this theory there are two possible representations of charge, and there is a reflection symmetry between them which, along with a gauge-like invariance, achieves the unification. Here it is shown that mirror matter arises naturally out of the degenerate theory, and as a result a new means for measuring the Brans–Dicke constant is obtained.

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  1. 1.

    Berezhiani, Z.: Mirror World and its cosmological consequences. Int. J. Mod. Phys. A 19, 3775–3806 (2004)

    ADS  Article  Google Scholar 

  2. 2.

    Okun, L.B.: Mirror particles and mirror matter: 50 years of speculation and search. Phys. Usp. 50, 380–389 (2007)

    ADS  Article  Google Scholar 

  3. 3.

    Mohapatra, R.N., Teplitz, V.L.: Structures in the mirror universe. Astrophys. J. 478, 29–38 (1997)

    ADS  Article  Google Scholar 

  4. 4.

    Mohapatra, R.N., Teplitz, V.L.: Mirror dark matter and galaxy core densities. Phys. Rev. D 62, 063506 (2000)

    ADS  Article  Google Scholar 

  5. 5.

    Mohapatra, R.N., Nussinov, S., Teplitz, V.L.: Mirror matter as self-interacting dark matter. Phys. Rev. D 66, 063002 (2002)

    ADS  Article  Google Scholar 

  6. 6.

    Ignatiev, AYu., Volkas, R.R.: Mirror dark matter and large scale structure. Phys. Rev. D 68, 023518 (2003)

    ADS  Article  Google Scholar 

  7. 7.

    Ciarcelluti, P.: Cosmology with mirror dark matter. Int. J. Mod. Phys. D 19, 2151–2230 (2010)

    ADS  Article  Google Scholar 

  8. 8.

    Foot, R.: Mirror dark matter: cosmology, galaxy structure and direct detection. Int. J. Mod. Phys. A 29, 1430013 (2014)

    ADS  MathSciNet  Article  Google Scholar 

  9. 9.

    Berezhiani, Z.G., Dolgov, A.D., Mohapatra, R.N.: Asymmetric inflationary reheating and the nature of mirror universe. Phys. Lett. B 375, 26–36 (1996)

    ADS  MathSciNet  Article  Google Scholar 

  10. 10.

    Berezhiani, Z., Comelli, D., Villante, F.L.: The early mirror universe: inflation, baryogenesis, nucleosynthesis and dark matter. Phys. Lett. B 503, 362–375 (2001)

    ADS  Article  Google Scholar 

  11. 11.

    Foot, R., Ignatiev, AYu., Volkas, R.R.: Physics of mirror photons. Phys. Lett. B 503, 355–361 (2001)

    ADS  Article  Google Scholar 

  12. 12.

    An, H., Chen, S.L., Mohapatra, R.N., Nussinov, S., Zhang, Y.: Energy dependence of direct detection cross section for asymmetric mirror dark matter. Phys. Rev. D 82, 023533 (2010)

    ADS  Article  Google Scholar 

  13. 13.

    Foot, R.: A comprehensive analysis of the dark matter direct detection experiments in the mirror dark matter framework. Phys. Rev. D 82, 095001 (2010)

    ADS  Article  Google Scholar 

  14. 14.

    Berezhiani, Z.: Neutron lifetime puzzle and neutron—mirror neutron oscillation. Eur. Phys. J. C 79, 484 (2019)

    ADS  Article  Google Scholar 

  15. 15.

    Broussard, L.J. et al.: New search for mirror neutron regeneration. In: EPJ Web. Conf., vol. 219, 07002 (2019)

  16. 16.

    Searight, T.P.: On degenerate metrics, dark matter and unification. J. Math. Phys. 58, 122502 (2017)

    ADS  MathSciNet  Article  Google Scholar 

  17. 17.

    Searight, T.P.: Completing the dark matter solutions in degenerate Kaluza-Klein theory. J. Math. Phys. 60, 042501 (2019)

    ADS  MathSciNet  Article  Google Scholar 

  18. 18.

    Searight, T.P.: f(R) Gravity in a Kaluza-Klein theory with degenerate metric. Found. Phys. 50, 147–160 (2020)

    ADS  MathSciNet  Article  Google Scholar 

  19. 19.

    Brans, C., Dicke, R.H.: Mach’s principle and a relativistic theory of gravitation. Phys. Rev. 124, 925–935 (1961)

    ADS  MathSciNet  Article  Google Scholar 

  20. 20.

    Will, C.M.: The confrontation between general relativity and experiment. Living Rev. Relativ. 17, 4 (2014)

    ADS  Article  Google Scholar 

  21. 21.

    Badertscher, A., et al.: An improved limit on invisible decays of positronium. Phys. Rev. D 75, 032004 (2007)

    ADS  Article  Google Scholar 

Download references

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Searight, T.P. Mirror Matter from a Unified Field Theory. Found Phys 51, 11 (2021). https://doi.org/10.1007/s10701-021-00421-4

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  • Mirror matter
  • Mirror world
  • Unified field theory
  • Degenerate metric
  • Brans-Dicke theory