Axion cosmology with its scalar superpartner

被引：34
|
作者：
Hashimoto, M [1 ]
Izawa, KI
Yamaguchi, M
Yanagida, T
机构：
[1] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
来源：
PHYSICS LETTERS B | 1998年 / 437卷 / 1-2期
关键词：
D O I：
10.1016/S0370-2693(98)00887-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In supersymmetric theories, the Peccei-Quinn symmetry has a complex extension as a symmetry of the superpotential, so that the scalar potential always has an almost flat direction, the dilaton. We discuss how coherent oscillation of the dilaton affects axion cosmology. We stress that the dilaton decay, if its dominant mode is not into axions, releases large entropy at a late epoch of the Universe's evolution to dilute axion energy density and the upperbound of the decay constant is raised up to about 10(15) GeV. The case of the M-theory axion is also discussed. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：44 / 50
页数：7
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