arXiv 1411.07522014-11hep-ph

电弱相互作用狄拉克暗物质

Electroweakly-Interacting Dirac Dark Matter

Natsumi Nagata, Satoshi Shirai

备注：: 5 pages, 3 figures
发表信息：: Phys. Rev. D 91, 055035 (2015)
DOI：: 10.1103/PhysRevD.91.055035

摘要：

我们考虑一类在SU（2）$_Y$和U（1）$_L$规范相互作用下都带电的费米子暗物质候选体。在这种情况下，应该存在一定量的暗物质-希格斯耦合，它可以将暗物质分裂成一对马约拉纳费米子，以逃避暗物质直接探测实验的限制。这些效应可以通过暗物质与核之间通过希格斯玻色子交换过程的散射，以及由暗物质及其SU（2）$_L$伙伴场诱导的电偶极矩来探测。在这篇文章中，我们用一种有效的实地方法来评估它们。结果表明，实验对物理量的限制已经限制了超荷$Y\geq 3/2$的暗物质。未来的实验对探测这类暗物质候选者很敏感，如果没有观察到信号，可能不利于$Y\geq 1$的情况。在这种情况下，只有$Y=0$和$1/2$情况可能是SU（2）$_L$带电费米子暗物质候选者的剩余可能性。

英文摘要：

We consider a class of fermionic dark matter candidates that are charged under both the SU(2)$_L$ and U(1)$_Y$ gauge interactions. In this case a certain amount of dark matter-Higgs couplings, which can split the dark matter into a pair of Majorana fermions, should be present to evade the constraints from the dark matter direct detection experiments. These effects may be probed by means of the dark matter-nucleus scattering via the Higgs-boson exchange process, as well as the electric dipole moments induced by the dark matter and its SU(2)$_L$ partner fields. In this article, we evaluate them with an effective field approach. It turns out that the constraints coming from the experiments for the quantities have already restricted the dark matter with hypercharge $Y\geq 3/2$. Future experiments have sensitivities to probe this class of dark matter candidates, and may disfavor the $Y\geq 1$ cases if no signal is observed. In this case, only the $Y=0$ and $1/2$ cases may be the remaining possibilities for the SU(2)$_L$ charged fermionic dark matter candidates.

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。

摘要：

英文摘要：

相关论文