Breit-Wigner enhancement of dark matter annihilation

被引：192

作者：

Ibe, Masahiro ^{[1
]}

Murayama, Hitoshi ^{[2
,3
,4
]}

Yanagida, T. T. ^{[2
,5
]}

机构：

[1] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[2] Univ Tokyo, Inst Phys & Math Universe, Kashiwa, Chiba 2778568, Japan

[3] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA

[5] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW D | 2009年 / 79卷 / 09期

关键词：

ENERGIES;

D O I：

10.1103/PhysRevD.79.095009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We point out that annihilation of dark matter in the galactic halo can be enhanced relative to that in the early Universe due to a Breit-Wigner tail, if the dark matter annihilates through a pole just below the threshold. This provides a new explanation to the "boost factor" which is suggested by the recent data of the PAMELA, ATIC and PPB-BETS cosmic ray experiments.

引用

页数：5

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