Direct Detection of Dark Matter Electromagnetic Dipole Moments
Direct Detection of Dark Matter Electromagnetic Dipole Moments
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发表时间：
2010-07
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通讯作者：
T. Banks;J. Fortin;S. Thomas
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作者：
T. Banks;J. Fortin;S. Thomas
具有电磁偶极矩的暗物质候选者可以在规范介导或人工色模型中作为暗重子出现。这些暗物质候选者在直接探测实验中主要通过磁和/或电偶极矩与原子核相互作用。散射截面依赖于核磁矩和核电荷，与典型的WIMP常数接触相互作用相比，具有红外增强，导致独特的核反冲能谱。这些特征导致DAMA实验与CDMS或XENON实验相比信号增强。DAMA的正结果，沿着CDMS和XENON的零结果，与具有磁偶极矩和质量约为10 GeV的暗物质粒子一致。重要的直接探测信号可以从质量高达数十TeV的偶极暗物质中产生。
Dark matter candidates with electromagnetic dipole moments can arise as dark baryons in gauge-mediated or technicolor models. These dark matter candidates interact with nuclei in direct detection experiments mainly through magnetic and/or electric dipole moments. The scattering cross sections depend on the nuclear magnetic moments and nuclear charge and have an infrared enhancement compared with typical WIMP constant contact interactions, leading to distinctive nuclear recoil energy spectra. These characteristics result in an enhanced signal for the DAMA experiment compared with the CDMS or XENON experiments. The positive results of DAMA, along with the null results of CDMS and XENON, are consistent with a dark matter particle with magnetic dipole moment and a mass around ten GeV. Significant direct detection signals can arise from dipolar dark matter with mass up to of order tens of TeV.