论文标题
Xenon1t异常及其对衰减温暖的暗物质的影响
XENON1T Anomaly and its Implication for Decaying Warm Dark Matter
论文作者
论文摘要
在异种后坐力数据中观察到过多的电子后坐力数据。过剩的合理解释之一是吸收矢量玻感粒子，质量为$ 2-3 \，{\ rm kev} $。为此，如果深色光子解释了当前的DM丰度，则需要将深色光子的动力学混合$κ\！\ sim \！我们最近提出了一个模型，当今的主要成分DM是一种腐烂的温暖的暗物质（WDM），其寿命与当前宇宙的年龄相当。 WDM衰减到无质量的费米和巨大的深色光子。该模型最初是为解决$λ$ CDM遭受的小规模问题和$ H_ {0} $张力而设计的。在这封信中，我们表明，WDM衰减产生的巨大的深色光子可以通过矢量玻色子来识别，从而在Xenon1t实验中诱导异常过量。根据父衰减WDM的寿命，深色光子可以是当今DM种群的主要成分或子组成部分。
An excess in the electronic recoil data was observed in the XENON1T detector. One of plausible explanations for the excess is absorption of a vector bosonic particle with the mass of $2-3\,{\rm keV}$. For this, the kinetic mixing $κ\!\sim\!10^{-15}$ of the dark photon with the photon is required if the dark photon explains the current DM abundance. We recently proposed a model where the main component DM today is a decaying warm dark matter (WDM) with the life time comparable to the age of the current universe. The WDM decays to a massless fermion and a massive dark photon. This model was originally designed for addressing both the small scale problems which $Λ$CDM suffers from and the $H_{0}$ tension. In this letter, we show that the massive dark photon produced by the WDM decay can be identified with the vector boson inducing the anomalous excess in the XENON1T experiment. Depending on a lifetime of the parent decaying WDM, the dark photon could be either the main component or the sub-component of DM population today.
