Superheavy Dark Matter and Thermal Inflation

Abstract

The thermal inflation is the most plausible mechanism that solves the cosmological moduli problem naturally. We discuss relic abundance of superheavy particle $X$ in the presence of the thermal inflation assuming that its lifetime is longer than the age of the universe, and show that the long-lived particle $X$ of mass $10^{12}$--$10^{14}$ GeV may form a part of the dark matter in the present universe in a wide region of parameter space of the thermal inflation model. The superheavy dark matter of mass $\sim 10^{13}$ GeV may be interesting in particular, since its decay may account for the observed ultra high-energy cosmic rays if the lifetime of the $X$ particle is sufficiently long.

13 pages (RevTex file) including 8 figures, revised version to be published in Physical Review D

References in corpus (1)

• Cosmological Constraints on Late-time Entropy Production

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• Models of inflation liberated by the curvaton hypothesis
• The hybrid inflation waterfall and the primordial curvature perturbation
• Superheavy Thermal Dark Matter and Primordial Asymmetries
• Quintessence From The Decay of a Superheavy Dark Matter
• Inflationary models with a flat potential enforced by non-abelian discrete gauge symmetries
• Holomorphic selection rules, the origin of the mu term, and thermal inflation