论文标题
Singlet Fermionic暗物质与深色$ z $
Singlet Fermionic Dark Matter with Dark $Z$
论文作者
论文摘要
我们提出了一个由隐藏量表玻色子介导的费米神经暗物质模型。我们假设像QED一样的隐藏扇区由Dirac Fermion和U（1）$ _ x $ gauge对称性组成，并以U（1）$ _ x $充电作为中介引入了一个额外的标量electroweak Doublet场。隐藏的u（1）$ _ x $对称性被电动对称性破裂自发打破，并且在该模型中存在一个巨大的额外中性量规玻色子，这是隐藏和可见扇区之间的中介。由于u（1）$ _ x $充电，额外的标量双重表不符合标准模型费米子，这导致了I型Higgs Two Higgs Doublet模型的HIGGS领域。新的量规玻色子夫妇与标准模型费米子的耦合与普通$ z $ boson成正比，但非常受压制，因此我们称其为“黑暗$ z $ boson”。我们研究了深色$ z $玻色子和希格斯行业的现象学，并表明隐藏的费米昂可以是暗物质候选人。
We present a fermionic dark matter model mediated by the hidden gauge boson. We assume the QED-like hidden sector which consists of a Dirac fermion and U(1)$_X$ gauge symmetry, and introduce an additional scalar electroweak doublet field with the U(1)$_X$ charge as a mediator. The hidden U(1)$_X$ symmetry is spontaneously broken by the electroweak symmetry breaking and there exists a massive extra neutral gauge boson in this model which is the mediator between the hidden and visible sectors. Due to the U(1)$_X$ charge, the additional scalar doublet does not couple to the Standard Model fermions, which leads to the Higgs sector of type I two Higgs doublet model. The new gauge boson couples to the Standard Model fermions with couplings proportional to those of the ordinary $Z$ boson but very suppressed, thus we call it the dark $Z$ boson. We study the phenomenology of the dark $Z$ boson and the Higgs sector, and show the hidden fermion can be the dark matter candidate.
