论文标题
通用u $（1）_x $模型中的两个组件标量和费米尼暗物质候选
Two-component scalar and fermionic dark matter candidates in a generic U$(1)_X$ model
论文作者
论文摘要
我们考虑$ u（1）_x \ otimes \ mathbb {z} _2 \ otimes \ otimes \ mathbb {z}'_ 2 $标准模型（SM）的扩展，其中$ u（1）_x $ sm的电荷是由其超额充电和b $ l $ - $ l $ l number的线性组合给出的。除SM粒子含量外，该模型还包含三个右撇子中微子（RHNS）$ n_r^i $和两个标量$φ$，$χ$，在SM量规组下的所有单元，但在$ u（1）_x $ geguge组下收取。这些其他字段中的两个，fermion $ n_r^3 $在$ \ m mathbb {z} _2 $下是奇怪的，而标量$χ$在$ \ mathbb {z}'_ 2 $对称下是奇数。因此，$χ$和$ n_r^3 $都有助于观察到的暗物质遗物密度，从而导致两部分的暗物质候选者。我们详细研究了其暗物质特性，例如遗物密度和直接检测，考虑了对撞机研究的约束。我们发现，在我们的模型中，可能会将一种暗物质（DM）歼灭到另一个暗物质中，这可能会以一种重大的方式改变遗物密度。
We consider a $U(1)_X\otimes \mathbb{Z}_2\otimes \mathbb{Z}'_2$ extension of the Standard Model (SM), where the $U(1)_X$ charge of an SM field is given by a linear combination of its hypercharge and B$-$L number. Apart from the SM particle content, the model contains three right-handed neutrinos (RHNs) $N_R^i$ and two scalars $Φ$, $χ$, all singlets under the SM gauge group but charged under $U(1)_X$ gauge group. Two of these additional fields, fermion $N_R^3$ is odd under $\mathbb{Z}_2$ and scalar $χ$ is odd under $\mathbb{Z}'_2$ symmetry. Thus both $χ$ and $N_R^3$ contribute to the observed dark matter relic density, leading to two-component dark matter candidates. We study in detail its dark matter properties such as relic density and direct detection taking into account the constraints coming from collider studies. We find that in our model, there can be possible annihilation of one Dark Matter (DM) into the other, which may potentially alter the relic density in a significant way.
