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题名: SuperWIMP dark matter scenario in light of WMAP
作者: Wang, F ;  Yang, JM
刊名: EUROPEAN PHYSICAL JOURNAL C
出版日期: 2004
卷号: 38, 期号:1, 页码:129-133
关键词: COSMOLOGICAL CONSTRAINTS ;  NUCLEOSYNTHESIS ;  SUPERSYMMETRY ;  PROGRAM ;  DECAYS ;  MUON
学科分类: Physics
通讯作者: Wang, F , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Tohoku Univ, Dept Phys, Aoba Ku, Sendai, Miyagi 980, Japan
英文摘要: The heavy gravitino in the minimal supergravity (mSUGRA) models is likely to be the lightest supersymmetric particle (LSP). Produced from the late decays of the metastable weakly interacting massive particles (WIMPS) such as the lightest neutralinos, the stable gravitinos can be plausible candidates for the cold dark matter in the universe. Such gravitino dark matter can naturally evade the current detection experiments due to its superweak couplings. However, this scenario must be subjected to the constraints from the big bang nucleosynthesis (BBN) predictions for light element abundances as well as the Wilkinson microwave anisotropy probe (WMAP) data for the relic density. Assuming the popular case in which the lightest neutralino is the next-to-lightest supersymmetric particle (NLSP), we find that requiring BBN predictions for light element abundances to agree with the WMAP data can impose upper and lower mass bounds on both the gravitino LSP and the neutralino NLSP. A scan over the mSUGRA parameter space, subjected to the BBN constraints, the WMAP data and the b --> sgamma bounds, shows that the low tan beta (less than or similar to 40) region as well as the region accessible at the CERN Large Hadron Collider (LHC) will be severely constrained. Such stringent constraints on the parameter space might be instructive for testing this scenario in future collider experiments.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000225864400011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13934
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Wang, F,Yang, JM. SuperWIMP dark matter scenario in light of WMAP[J]. EUROPEAN PHYSICAL JOURNAL C,2004,38(1):129-133.
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