arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.01443hep-ph
收藏

一般U $(1)_X$模型中的两分量标量和费米子暗物质候选者

Two-component scalar and fermionic dark matter candidates in a generic U$(1)_X$ model

Arindam Das, Shivam Gola, Sanjoy Mandal, Nita Sinha

摘要:

考虑标准模型的一个$U(1)_X\otimes \mathbb{Z}_2\otimes \mathbb{Z}'_2$推广,其中SM场的$U(1)_X$荷由其超荷和B $-$ L数的线性组合给出.除了SM粒子的内容,该模型包含三个右手中微子(RHN)$N_R^i$和两个标量$Φ$,$χ$,所有的单态下的SM规范群,但在$U(1)_X$规范群带电。其中两个额外的领域,费米子$N_R^3$是奇数下$\mathbb{Z}_2$和标量$χ$是奇数下$\mathbb{Z}'_2$对称性。因此,$χ$和$N_R^3$都对观测到的暗物质遗迹密度有贡献,从而产生了双组分暗物质候选者。我们详细研究了它的暗物质属性,如遗迹密度和直接检测考虑到来自对撞机研究的约束。我们发现,在我们的模型中,一种暗物质(DM)可能会湮灭到另一种物质中,这可能会以一种重要的方式改变遗迹密度。

英文摘要:

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.

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。

↑