Supersymmetry and the positron excess in cosmic rays

被引：69

作者：

Kane, GL ^{[1
]}

Wang, LT

Wells, JD

机构：

[1] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[2] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW D | 2002年 / 65卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.65.057701

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently the HEAT balloon experiment has confirmed an excess of high-energy positrons in cosmic rays. They could come from annihilation of dark matter in the galactic halo. We discuss expectations for the positron signal in cosmic rays from the lightest superpartner (LSP). The simplest interpretations are incompatible with the size and shape of the excess if the relic LSPs evolved from thermal equilibrium. Nonthermal histories can describe a sufficient positron rate. Reproducing the energy spectrum is more challenging, but perhaps possible. The resulting light superpartner spectrum is compatible with collider physics, the muon anomalous magnetic moment, Z-pole electroweak data, and other dark matter searches.

引用

页数：4

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