Kaluza-Klein dark matter and the positron excess
Kaluza-Klein dark matter and the positron excess
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DOI：
10.1103/physrevd.70.115004
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发表时间：
2004-06
影响因子：
5
通讯作者：
D. Hooper;G. Kribs
中科院分区：
文献类型：
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作者：
D. Hooper;G. Kribs
高能反物质望远镜（HEAT）实验观测到的宇宙正电子过剩可能是卡鲁扎-克莱因暗物质在星系晕中湮灭的结果。Kaluza-Klein暗物质主要湮灭为带电轻子，每次湮灭产生大量的硬谱正电子。给定一个质量在300 GeV-400 GeV范围内的卡鲁扎-克莱因暗物质粒子，在暗物质的局部分布中不需要特殊的子结构或聚集来产生解释HEAT观测的正电子通量。这与超对称暗物质形成对比，超对称暗物质需要不自然的大量暗子结构来产生所观察到的正电子过剩。未来的天体物理和对撞机测试概述，将确认或排除这种解释的热数据。
The excess of cosmic positrons observed by the High-Energy Antimatter Telescope (HEAT) experiment may be the result of Kaluza-Klein dark matter annihilating in the galactic halo. Kaluza-Klein dark matter annihilates dominantly into charged leptons that yield a large number and hard spectrum of positrons per annihilation. Given a Kaluza-Klein dark matter particle with a mass in the range of 300 GeV-400 GeV, no exceptional substructure or clumping is needed in the local distribution of dark matter to generate a positron flux that explains the HEAT observations. This is in contrast to supersymmetric dark matter which requires unnaturally large amounts of dark substructure to produce the observed positron excess. Future astrophysical and collider tests are outlined that will confirm or rule out this explanation of the HEAT data.