论文标题

用鱼暗物质解释Xenon-1T信号,在$ u(1)_ {x} $扩展中中微子质量

Explaining Xenon-1T signal with FIMP dark matter and neutrino mass in a $U(1)_{X}$ extension

论文作者

Khan, Sarif

论文摘要

在目前的工作中,我们通过Abelian $ u(1)_ {x} $ gauge组和其他粒子扩展了标准模型。特别是,我们已经将粒子含量扩展到三个右手中微子,两个单重标量量表和两个矢量(例如瘦素)。不同量规组下的充电分配是这样的模型是无异常的,并且各代的异常贡献取消。一旦对称被打破,就产生了三个物理希格斯,一个像粒子(ALP)一样的轴(也充当kev尺度fimp暗物质)会产生,其余成分被多余的仪表玻色子吸收。首先,我们通过eScillation参数的$3σ$结合的$3σ$成功地通过I型SEESAW机制成功生成了中微子质量。本模型中的ALP可以通过与电子的耦合来解释Xenon-1T电子后坐信号。我们还拥有诸如Lepton的矢量,可以通过冻结机制从衰减中产生暗物质。电子和Tauon从Planck量表上从维数5运算符获得质量,如果我们考虑VEVS $ v_ {1,2} \ simeq 10^{12} $ gev,那么我们可以获得电子质量的正确值,而不是Tauon质量。像Leptons这样的向量有助于通过另一个更高维操作员获得Tauon质量的正确值,该操作员还通过$ 2 \ rightarrow 2 $工艺在DM生产中发挥作用,从而为宇宙的适当重新温度提供了正确的遗物密度的正确棒球值。我们已经表明,较高维操作员的ALP产生可以同时解释电子,Tauon质量和Xenon-1T信号,而衰减产生不能一起解释所有这些信号。

In the present work, we have extended the standard model by an abelian $U(1)_{X}$ gauge group and additional particles. In particular, we have extended the particle content by three right handed neutrinos, two singlet scalars and two vector like leptons. Charged assignments under different gauge groups are such that the model is gauge anomaly free and the anomaly contributions cancel among generations. Once the symmetry gets broken then three physical Higgses are produced, one axion like particle (ALP), which also acts as the keV scale FIMP dark matter, is produced and the remaining component is absorbed by the extra gauge boson. Firstly, we have successfully generated neutrino mass by the type-I seesaw mechanism for normal hierarchy with the $3σ$ bound on the oscillation parameters. The ALP in the present model can explain the Xenon-1T electron recoil signal at keV scale through its coupling with the electron. We also have vector like leptons which help in producing the dark matter from their decay by the freeze in mechanism. Electron and tauon get mass from dimensional-5 operators at Planck scale and if we consider the vevs $v_{1,2} \simeq 10^{12}$ GeV then we can obtain the correct value of the electron mass but not the tauon mass. Vector like leptons help in getting the correct value of the tauon mass through another higher dimensional operator which also has a role in DM production by the $2 \rightarrow 2$ process, giving the correct ballpark value of relic density for suitable reheat temperature of the Universe. We have shown that the ALP production by the higher dimensional operator can explain the electron, tauon mass and Xenon-1T signal simultaneously whereas the decay production can not explain all of them together.

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