Light dark matter in NMSSM and implication on Higgs phenomenology

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	Light dark matter in NMSSM and implication on Higgs phenomenology
	Yang, JM
刊名	PHYSICS LETTERS B
	2011
卷号	703 期号:3 页码:292-297
关键词	SUPERSYMMETRIC STANDARD MODEL
ISSN号	0370-2693
通讯作者	Yang, JM (reprint author), Acad Sinica, Inst Theoret Phys, Beijing 100190, Peoples R China.
英文摘要	For the experimental search of neutralino dark matter, it is important to know its allowed mass and scattering cross section with the nucleon. In order to figure out how light a neutralino dark matter can be predicted in low energy supersymmetry, we scan over the parameter space of the NMSSM (next-to-minimal supersymmetric model), assuming all the relevant soft mass parameters to be below TeV scale. We find that in the parameter space allowed by current experiments the neutralino dark matter can be as light as a few GeV and its scattering rate off the nucleon can reach the sensitivity of XENON100 and CoGeNT. As a result, a sizable parameter space is excluded by the current XENON100 and CoGeNT data (the plausible CoGeNT dark matter signal can also be explained). The future 6000 kg-days exposure of XENON100 will further explore (but cannot completely cover) the remained parameter space. Moreover, we find that in such a light dark matter scenario a light CP-even or CP-odd Higgs boson must be present to satisfy the measured dark matter relic density. Consequently, the SM-like Higgs boson h(SM) may decay predominantly into a pair of light Higgs bosons or a pair of neutralinos so that the conventional decays like h(SM) -> gamma gamma is much suppressed. (C) 2011 Elsevier B.V. All rights reserved.
学科主题	Physics
收录类别	SCI
资助信息	JSPS [S-11028]; NSFC [10821504, 10725526, 11075045, 11005006]; Doctor Foundation of BJUT from China [X0006015201102]; Grant-in-Aid for Scientific Research from Japan [14046201]
原文出处	http://dx.doi.org/10.1016/j.physletb.2011.07.086
语种	英语
WOS记录号	WOS:000295198300012
公开日期	2013-05-17
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/14272]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Yang, JM. Light dark matter in NMSSM and implication on Higgs phenomenology[J]. PHYSICS LETTERS B,2011,703(3):292-297.
APA	Yang, JM.(2011).Light dark matter in NMSSM and implication on Higgs phenomenology.PHYSICS LETTERS B,703(3),292-297.
MLA	Yang, JM."Light dark matter in NMSSM and implication on Higgs phenomenology".PHYSICS LETTERS B 703.3(2011):292-297.