International Journal of Theoretical Physics

, Volume 35, Issue 1, pp 135-154

First online:

Production of Dirac particles due to Riccion coupling

  • S. K. SrivastavaAffiliated withDepartment of Mathematics, North Eastern Hill UniversityIUCAA
  • , K. P. SinhaAffiliated withInstitute of Fundamental Research, North Eastern Hill UniversityDepartment of Physics, Indian Institute of Science

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It has been noted that at high energy the Ricci scalar is manifested in two different ways, as a matter field as well as a geometrical field (which is its usual nature even at low energy). Here, using the material aspect of the Ricci scalar, its interaction with Dirac spinors is considered in four-dimensional curved space-time. We find that a large number of fermion-antifermion pairs can be produced by the exponential expansion of the early universe.