论文标题
面对银河511 kev排放与$ b-l $ gauge玻色子暗物质
Confronting the Galactic 511 keV emission with $B-L$ gauge boson dark matter
论文作者
论文摘要
$ b-l $量规对称性是由成功产生的Seesaw机制和瘦素发生的。我们表明，如果$ b-l $仪表玻色子占暗物质的一小部分（DM），则可以通过衰减将银河系$ 511 $ keV的发射解释为电子峰值对。我们发现与Seesaw机制一致的模型参数空间，在宇宙学上可行，并考虑了银河正电子线的振幅。从这个参数空间中，我们得出了仪表玻色子质量的上限，然后是正电子注入能量$ \ lyssim3 $ meV的界限。这种派生的能量结合与注射能的观察上限一致。最终的模型预测$ b-l $打破量表在相对狭窄的范围内，即$ v_ {b \ textrm { - } l} \ sim10^{15} \ textrm { - } 10^{16} $ gev，这与大统一（gut）（gut）量表机械级是一致的。该模型在几种现象学中是一致的，这表明它们从B-L对称性破裂中的共同起源。
The $B-L$ gauge symmetry motivated from the successful generation of the seesaw mechanism and leptogenesis. We show that if the $B-L$ gauge boson constitutes a small fraction of the dark matter (DM) it can explain the Galactic $511$ keV emission via the decay into an electron-positron pair. We find the model parameter space that is consistent with the seesaw mechanism, cosmologically viable, and accounting for the amplitude of the Galactic positron line. From this parameter space we derive an upper bound of the gauge boson mass and then an bound of the positron injection energy $\lesssim3$ MeV. This derived energy bound is consistent with the observational upper limit of the injection energy. The resultant model predicts the $B-L$ breaking scale to be in a relatively narrow range, i.e., $V_{B\textrm{--}L}\sim10^{15} \textrm{--} 10^{16} $GeV, which is consistent with a Grand Unification (GUT) scale seesaw mechanism. The model is consistent in several phenomenologies, suggesting their common origin from the B-L symmetry breaking.
