Cosmological moduli problem in gauge-mediated supersymmetry breaking theories

被引：57

作者：

Asaka, T ^{[1
]}

Hashiba, J

Kawasaki, M

Yanagida, T

机构：

[1] Univ Tokyo, Inst Cosm Ray Res, Tanashi, Tokyo 188, Japan

[2] Univ Tokyo, Dept Phys, Tokyo 113, Japan

来源：

PHYSICAL REVIEW D | 1998年 / 58卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.58.083509

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A generic class of string theories predicts the existence of light moduli fields, and they are expected to have masses m(phi) comparable to the gravitino mass m(3/2) which is in a range of 10(-2) keV to 1 GeV in gauge-mediated supersymmetry breaking theories. Such light fields with weak interactions suppressed by the Planck scale cannot avoid some stringent cosmological constraints; that is, they suffer from "cosmological moduli problems." We show that the total gravitino mass region 10(-2) keV less than or similar to m(3/2) 1 GeV is excluded by the constraints even if we incorporate late-time mini-inflation (thermal inflation). However, a modification of the original thermal inflation model enables the region 10(-2) keV less than or similar to m(3/2) less than or similar to 500 keV to survive the constraints. It is also stressed that the moduli can be dark matter in our universe for the mass region 10(-2) keV less than or similar to m(phi) less than or similar to 100 keV. [S0556-2821(98)07718-2].

引用

页数：12

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