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题名: Direct Detection of Dark Matter with Resonant Annihilation
作者: Li, B;  Zhou, YF
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2015
卷号: 64, 期号:1, 页码:119-126
关键词: resonant annihilation ;  relic density ;  neutrino background ;  DM direct detection experiments
学科分类: Physics
通讯作者: Zhou, YF (reprint author), Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: In the scenario where the dark matter (DM) particles chi(chi) over bar pair annihilate through a resonance particle R, the constraint from DM relic density makes the corresponding cross section for DM-nuclei elastic scattering extremely small, and can be below the neutrino background induced by the coherent neutrino-nuclei scattering, which makes the DM particle beyond the reach of the conventional DM direct detection experiments. We present an improved analytical calculation of the DM relic density in the case of resonant DM annihilation for s- and p-wave cases and invesitgate the condition for the DM-nuclei scattering cross section to be above the neutrino background. We show that in Higgs-portal type models, for DM particles with s-wave annihilation, the spin-independent DM-nucleus scattering cross section is proportional to Gamma(R)/m(R), the ratio of the decay width and the mass of R. For a typical DM particle mass similar to 50 GeV, the condition leads to Gamma(R)/m(R) greater than or similar to O(10(-4)). In p-wave annihilation case, the spin-independent scattering cross section is insensitive to Gamma(R)/m(R), and is always above the neutrino background, as long as the DM particle is lighter than the top quark. The real singlet DM model is discussed as a concrete example.
类目[WOS]: Physics, Multidisciplinary
关键词[WOS]: ELECTROWEAK PHASE-TRANSITION ;  REAL HIGGS SINGLET ;  LEFT-RIGHT MODEL ;  STANDARD MODEL ;  CP VIOLATION ;  ABUNDANCES ;  PARTICLES ;  SCALAR
收录类别: SCI
项目资助者: National Basic Research Program of China (973 Program) [2010CB833000] ;  National Nature Science Foundation of China (NSFC) [10975170, 10821504, 10905084, 11335012] ;  Project of Knowledge Innovation Program (PKIP) of the Chinese Academy of Science
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20936
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Li, B,Zhou, YF. Direct Detection of Dark Matter with Resonant Annihilation[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2015,64(1):119-126.
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