Superheavy dark matter and thermal inflation

被引：8

作者：

Asaka, T ^{[1
]}

Kawasaki, M

Yanagida, T

机构：

[1] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[2] Univ Tokyo, Res Ctr early Universe, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW D | 1999年 / 60卷 / 10期

关键词：

D O I：

10.1103/PhysRevD.60.103518

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Thermal inflation is the most plausible mechanism that solves the cosmological moduli problem naturally. We discuss the relic abundance of a superheavy particle X in the presence of 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 similar to 10(13) GeV may be interesting in particular, since its decay may account for the observed ultrahigh-energy cosmic rays if the lifetime of the X particle is sufficiently long. [S0556-2821(99)06020-8].

引用

页数：2

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