论文标题
在最高能量的$γ$ ray-ray blazars中搜索类似轴的颗粒的烙印
Search for the imprint of axion-like particles in the highest-energy photons of hard $γ$-ray blazars
论文作者
论文摘要
在标准模型之外的理论中预测的轴突状颗粒（ALP）可以在存在磁场的情况下对宇宙对$γ$射线的透明度具有观察性影响。在这项工作中，我们通过将观察到的最高能量光子从Z $ \ geQ $ 0.1的源中观察到的最高能量光子的分布与在ALP的存在的理论预测中进行比较，搜索了与$ {\ it fermi} $大面积望远镜的80个月数据兼容的效果。我们发现没有证据表明由于阿尔卑斯山而增加$γ$ ray的透明度，因此我们对阿尔卑斯山参数设定了限制，假设白术磁场强度为1 ng。 $ 10^{ - 11} $ gev $^{ - 1} $的光子 - alp耦合被排除在Alp Masses $ M_ {a} $ $ \ ysemsim3.0 $ nev中。这些限制排除了其他$γ$ -Ray望远镜未涵盖的参数空间的区域，并且与其他实验施加的约束兼容。
Axion-like particles (ALPs), predicted in theories beyond the Standard Model, can have observational effects on the transparency of the Universe to $γ$ rays in the presence of magnetic fields. In this work, we search for effects compatible with the existence of ALPs with 80 months of data from the ${\it Fermi}$ Large Area Telescope, by comparing the distributions of observed highest energy photons from sources beyond redshifts of z $\geq$ 0.1 with theoretical predictions in the presence of ALPs. We find no evidence for an increased $γ$-ray transparency due to ALPs and therefore we set limits on the ALPs parameters assuming a value of the intergalactic magnetic field strength of 1 nG. Photon-ALP couplings above $10^{-11}$ GeV$^{-1}$ are excluded for ALP masses $m_{a}$ $\lesssim3.0$ neV. These limits exclude a region of the parameter space not covered by other $γ$-ray telescopes and are compatible with constraints imposed by other experiments.
