论文标题
pico充电的粒子解释了511 keV线和Xenon1t信号
Pico-charged particles explaining 511 keV line and XENON1T signal
论文作者
论文摘要
对于来自银河系中心的511 keV光子线的信号可能是一个可靠的信号，它可能起源于少数MeV的暗物质颗粒。为了避免延迟重组的界限以及矮星系中没有线路的线路，我们提出了一个模型，其中暗物质首先衰减成一对中间Pico带电的粒子$ c \ bar {c} $，其生命周期比宇宙年龄大得多。银河磁场累积了相对论$ c \ bar {c} $，最终消灭了，产生了$ e^-e^+$对，从而产生了511 keV线。相对论PICO充电的$ C $颗粒可以散布在直接暗物质搜索探测器内的电子中，赋予了$ e_r \ sim $ 〜kev的后坐力能量。我们表明，该模型可以说明Xenon1t实验最近报告的电子后坐力多余。此外，我们表明Xenon1t电子后坐力数据集合在该模型中暗物质的寿命上最严格的束缚。
There is a robust signal for a 511 keV photon line from the galactic center which may originate from dark matter particles with masses of a few MeV. To avoid the bounds from delayed recombination and from the absence of the line from dwarf galaxies, in 2017, we have proposed a model in which dark matter first decays into a pair of intermediate pico-charged particles $C\bar{C}$ with a lifetime much larger than the age of the universe. The galactic magnetic field accumulates the relativistic $C\bar{C}$ that eventually annihilate, producing the $e^-e^+$ pair that give rise to the 511 keV line. The relativistic pico-charged $C$ particles can scatter on the electrons inside the direct dark matter search detectors imparting a recoil energy of $E_r \sim$~keV. We show that this model can account for the electron recoil excess recently reported by the XENON1T experiment. Moreover, we show that the XENON1T electron recoil data sets the most stringent bound on the lifetime of the dark matter within this model.
