arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.04278hep-phastro-ph.CO
收藏

弱相互作用$U(1)_{\rm B-L}$规范玻色子的暖暗物质和XENON1T反常

Feebly Interacting $U(1)_{\rm B-L}$ Gauge Boson Warm Dark Matter and XENON1T Anomaly

Gongjun Choi, Tsutomu T. Yanagida, Norimi Yokozaki

摘要:

最近,XENON1T探测器观测到的电子反冲数据过量引起了人们的广泛关注,这是对标准模型(SM)扩展的一个潜在暗示。质量为$m_{A'}\!\in\!(2\,{\rm keV},\!3\,{\rm keV})$的矢量玻色子的吸收是对过剩的一种可行的解释。在矢量玻色子解释了当今的暗物质(DM)的情况下,由于其可疑的质量状态,矢量玻色子很可能属于一类温暖的暗物质(WDM)。在这种情况下,为过量提供良好的拟合,动力学混合$κ\!\sim\!10^{-15}$要求矢量DM的非热起源。在这封信中,我们考虑的情况下,规范玻色子是什么,但$U(1)_{\rm B-L}$规范玻色子和它的非热起源是由于衰变的相干振荡标量的凝聚诱导自发破缺的$U(1)_{\rm B-L}$。我们讨论了早期宇宙物理学的影响时,温暖的性质的矢量DM作为一个解决方案,$Λ$ CDM模型遇到的小尺度问题和XENON1T异常。

英文摘要:

The recent observation of an excess in the electronic recoil data by the XENON1T detector has drawn many attentions as a potential hint for an extension of the Standard Model (SM). Absorption of a vector boson with the mass of $m_{A'}\!\in\!(2\,{\rm keV},\!3\,{\rm keV})$ is one of the feasible explanations to the excess. In the case where the vector boson explains the dark matter (DM) population today, it is highly probable that the vector boson belongs to a class of the warm dark matter (WDM) due to its suspected mass regime. In such a scenario, providing a good fit for the excess, the kinetic mixing $κ\!\sim\!10^{-15}$ asks for a non-thermal origin of the vector DM. In this letter, we consider a scenario where the gauge boson is nothing but the $U(1)_{\rm B-L}$ gauge boson and its non-thermal origin is attributed to the decay of the coherently oscillating scalar of which condensation induces the spontaneous breaking of $U(1)_{\rm B-L}$. We discuss implications for the early universe physics when the warm nature of the vector DM serves as a resolution to both the small scale problems that $Λ$CDM model encounters and the XENON1T anomaly.

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。

↑