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arXiv 0808.0255hep-ph
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WIMP暗物质、Higgs交换和DAMA

WIMP dark matter, Higgs exchange and DAMA

Sarah Andreas, Thomas Hambye, Michel H. G. Tytgat

摘要:

在WIMP方案中,如果暗物质的湮灭及其在核上的弹性散射均以Higgs交换为主,则暗物质残余密度与自旋无关的直接探测率之间存在一一对应的关系.特别地,对于比希格斯玻色子质量小得多的DM质量,相关截面的比率仅取决于DM质量。假设DM质量和直接探测率在最近DAMA合作结果允许的范围内-考虑到能量阈值的通道效应和其他直接探测实验的零结果-给出了遗迹密度的确定范围。对于标量DM模型,如希格斯门模型或惰性双重态模型,遗迹密度范围与WMAP一致。这种情况意味着希格斯玻色子对DM粒子对有很大的分支比,这一预测可能会挑战它在大型强子对撞机上的搜索。

英文摘要:

In the WIMP scenario, there is a one-to-one relation between the dark matter (DM) relic density and spin independent direct detection rate if both the annihilation of DM and its elastic scattering on nuclei go dominantly through Higgs exchange. In particular, for DM masses much smaller than the Higgs boson mass, the ratio of the relevant cross sections depends only on the DM mass. Assuming DM mass and direct detection rate within the ranges allowed by the recent DAMA collaboration results -taking account of the channelling effect on energy threshold and the null results of the other direct detection experiments- gives a definite range for the relic density. For scalar DM models, like the Higgs portal models or the inert doublet model, the relic density range turns out to be in agreement with WMAP. This scenario implies that the Higgs boson has a large branching ratio to pairs of DM particles, a prediction which might challenge its search at the LHC.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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