Nambu-Goldstone dark matter and cosmic ray electron and positron excess

被引：29

作者：

Ibe, Masahiro ^{[1
]}

Nakayama, Yu ^{[2
,3
]}

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

Yanagida, Tsutomu T. ^{[4
,5
]}

机构：

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

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

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

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

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

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2009年 / 04期

关键词：

Cosmology of Theories beyond the SM; Supersymmetric Standard Model; DYNAMICAL SUPERSYMMETRY BREAKING; ENERGIES; AXION;

D O I：

10.1088/1126-6708/2009/04/087

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We propose a model of dark matter identified with a pseudo-Nambu-Goldstone boson in the dynamical supersymmetry breaking sector in a gauge mediation scenario. The dark matter particles annihilate via a below-threshold narrow resonance into a pair of Raxions each of which subsequently decays into a pair of light leptons. The Breit-Wigner enhancement explains the excess electron and positron fluxes reported in the recent cosmic ray experiments PAMELA, ATIC and PPB-BETS without postulating an overdensity in halo, and the limit on anti-proton flux from PAMELA is naturally evaded.

引用

页数：20

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