PAMELA positron excess as a signal from the hidden sector

被引：154

作者：

Feldman, Daniel ^{[1
]}

Liu, Zuowei ^{[2
]}

Nath, Pran ^{[1
]}

机构：

[1] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

[2] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA

来源：

PHYSICAL REVIEW D | 2009年 / 79卷 / 06期

基金：

美国国家科学基金会;

关键词：

ANTIPROTONS; FRACTION; PROBE;

D O I：

10.1103/PhysRevD.79.063509

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The recent positron excess observed in the PAMELA satellite experiment strengthens previous experimental findings. We give here an analysis of this excess in the framework of the Stueckelberg extension of the standard model which includes an extra U(1)(X) gauge field and matter in the hidden sector. Such matter can produce the right amount of dark matter consistent with the Wilkinson Microwave Anisotropy Probe (WMAP) constraints. Assuming the hidden sector matter to be Dirac fermions it is shown that their annihilation can produce the positron excess with the right positron energy dependence seen in the HEAT, AMS, and the PAMELA experiments. The predictions of the pp flux ratio also fit the data.

引用

页数：5

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