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题名: Probing the fourth generation Majorana neutrino dark matter
作者: Zhou, YF
刊名: PHYSICAL REVIEW D
出版日期: 2012
卷号: 85, 期号:5, 页码:53005
关键词: ELECTROWEAK SYMMETRY-BREAKING ;  CP-VIOLATION ;  SEARCH ;  MASSES
学科分类: Physics
通讯作者: Zhou, YF (reprint author), Chinese Acad Sci Beijing, Kavli Inst Theoret Phys China, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.
部门归属: Chinese Acad Sci Beijing, Kavli Inst Theoret Phys China, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: The heavy fourth-generation Majorana neutrino can be stable and contribute to a small fraction of the relic density of dark matter (DM) in the Universe. Because of its strong coupling to the standard model particles, it can be probed by the current direct and indirect DM detection experiments even it is a subdominant component of the whole halo DM. Assuming that it contributes to the same fraction of the local halo DM density as that of the DM relic density in the Universe, we show that the current Xenon100 data constrain the mass of the stable Majorana neutrino to be greater than the mass of the top quark. In the mass range from 200 GeV to a few hundred GeV, the effective spin-independent cross section for the neutrino elastic-scattering off nucleon is insensitive to the neutrino mass and mixing, and is predicted to be similar to 1.5 X 10(-44) cm(2), which can be reached by the direct DM detection experiments soon. In the same mass region the predicted effective spin-dependent cross section for the heavy neutrino scattering off proton is in the range of 2 X 10(-40) cm(2) similar to 2 X 10(-39) cm(2), which is within the reach of the ongoing DM indirect search experiments such as IceCube. We demonstrate such properties of the heavy neutrino DM in a fourth-generation model with the stability of the fourth Majorana neutrino protected by an additional generation-dependent U(1) gauge symmetry.
资助者: National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10821504, 10905084]; Chinese Academy of Science
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000301477700003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15144
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Zhou, YF. Probing the fourth generation Majorana neutrino dark matter[J]. PHYSICAL REVIEW D,2012,85(5):53005.
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