Classical Inflation Field Induced Creation of Superheavy Dark Matter
Abstract
We calculate analytically and numerically the production of superheavy dark matter (X) when it is coupled to the inflation field f within the context of a slow-roll m2ff2/2 inflationary model with coupling g2X2f2/2. We find that X particles with a mass as large as 1000 Hi, where Hi is the value of the Hubble expansion rate at the end of inflation, can be produced in sufficient abundance to be cosmologically significant today. This means that superheavy dark matter may have a mass of up to 10-3MPl. We also derive a simple formula that can be used to estimate particle production as a result of a quantum field's interaction with a general class of homogeneous classical fields. Finally, we note that the combined effect of the inflaton field and the gravitational field on the X field causes the production to be a nonmonotonic function of g2.
- Publication:
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Ph.D. Thesis
- Pub Date:
- October 1998
- Bibcode:
- 1998PhDT........19C
- Keywords:
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- Physics: Elementary Particles and High Energy, Physics: Astronomy and Astrophysics