Gravitational particle production in braneworld cosmology

被引：8

作者：

Bambi, C. ^{[1
]}

Urban, F. R.

机构：

[1] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy

[2] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.99.191302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Gravitational particle production in a time variable metric of an expanding universe is efficient only when the Hubble parameter H is not too small in comparison with the particle mass. In standard cosmology, the huge value of the Planck mass M-Pl makes the mechanism phenomenologically irrelevant. On the other hand, in braneworld cosmology, the expansion rate of the early Universe can be much faster, and many weakly interacting particles can be abundantly created. Cosmological implications are discussed.

引用

页数：4

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