Constraints on scalar dark matter from direct experimental searches

Constraints on scalar dark matter from direct experimental searches
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直接实验搜索对标量暗物质的限制

DOI:
10.1103/physrevd.79.023521
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发表时间:
2008-11
期刊:
影响因子:
5
通讯作者:
Tsai, Ho-Chin
Tsai, Ho-Chin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
T;ean, Jusak;Li, Xue-Qian;He, Xiao-Gang;Li, Tong;Tsai, Ho-Chin

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标准模型(SM)加上一个被称为暗子的真实的规范单重标量场(SM+D)是最简单的具有弱相互作用大质量粒子(WIMP)暗物质候选者的模型。从最近的XENON 10和CDMS II实验中,作为WIMP质量函数的WIMP-核子弹性截面的上限分别排除了希格斯玻色子质量为(120,200,350)GeV的暗子质量范围从10到(50,70,75)GeV。这可能排除了暗子为EGRET数据中观察到的伽马射线过量提供解释的可能性。我们表明,通过扩展SM+D的两个希格斯双峰模型加上一个暗子的实验约束的WIMP核子相互作用可以绕过由于抑制发生在某些值的产品tan{alpha}tan{beta},与{alpha}是中性希格斯混合角和tan{beta}的希格斯双峰的真空期望值的比率。我们还评论的影响,暗粒子模型的希格斯粒子搜索在LHC。
The standard model (SM) plus a real gauge-singlet scalar field dubbed darkon (SM+D) is the simplest model possessing a weakly interacting massive particle (WIMP) dark-matter candidate. The upper limits for the WIMP-nucleon elastic cross section as a function of WIMP mass from the recent XENON10 and CDMS II experiments rule out darkon mass ranges from 10 to (50, 70, 75) GeV for Higgs-boson masses of (120, 200, 350) GeV, respectively. This may exclude the possibility of the darkon providing an explanation for the gamma-ray excess observed in the EGRET data. We show that by extending the SM+D to a two-Higgs-doublet model plus a darkon the experimental constraints on the WIMP-nucleon interactions can be circumvented due to suppression occurring at some values of the product tan{alpha}tan{beta}, with {alpha} being the neutral-Higgs mixing angle and tan{beta} the ratio of vacuum expectation values of the Higgs doublets. We also comment on the implication of the darkon model for Higgs searches at the LHC.
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