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arXiv 1709.08700hep-phastro-ph.CO
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具有磁偶极矩的暗物质直接探测信号

Direct detection signals of dark matter with magnetic dipole moment

Eugenio Del Nobile

摘要:

具有磁偶极矩的中性暗物质(DM)粒子相对于标准候选物具有非常不同的直接检测现象。这是由于与原子核散射的微分截面的特殊函数形式。这样的候选者可能是带电粒子的束缚态,如中子或原子,或者是与较重带电态耦合的基本粒子,很像狄拉克中微子。我们在这里分析的直接检测信号的DM与磁偶极矩,反冲率及其调制,并表明,他们是非常不同的预期在标准的情况下。对于这个候选者,与常见的知识相反,最大信号的时间取决于反冲能量以及靶材料。通过采用不同靶的实验观察到不同的调制将是有利于这种类型的DM颗粒的强烈指示。

英文摘要:

A neutral dark matter (DM) particle with a magnetic dipole moment has a very different direct detection phenomenology with respect to standard candidates. This is due to the peculiar functional form of the differential cross section for scattering with nuclei. Such a candidate could be a bound state of charged particles, as the neutron or an atom, or a fundamental particle coupled to heavier charged states, much like a Dirac neutrino. We analyze here the direct detection signals of DM with magnetic dipole moment, both the recoil rate and its modulation, and show that they are very different from those expected in standard scenarios. For this candidate, contrary to the common lore, the time of maximum signal depends on the recoil energy as well as on the target material. The observation of different modulations by experiments employing different targets would be a strong indication in favor of this type of DM particles.

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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