论文标题
用大型高空空气淋浴天文台测量的弥漫性伽玛射线通量来约束轴突样颗粒
Constraining axion-like particles with the diffuse gamma-ray flux measured by the Large High Altitude Air Shower Observatory
论文作者
论文摘要
通过ICECUBE实验检测非常高能量的中微子，这支持了来自相同宇宙加速器的可比伽马射线对应物的存在。在可能的假设是这些颗粒的来源是具有乳突外的来源，在宇宙距离的传播过程中，发射的光子通量将被显着吸收。但是，在存在与超光轴测样粒子（ALP）的光子混合在一起的情况下，这种期望将得到强烈修改。值得注意的是，宿主星系中的光子α转化会产生ALP通量，该ALP通量不受阻碍，在外层状空间中不受阻碍。然后，阿尔普斯在银河磁场中的后转换导致弥漫性高能量光子通量。在这种情况下，最近通过大型高空空气淋浴观测站（LHAASO）对弥漫性高能光子通量（LHAASO）的检测使我们可以排除在$ 95 \％$ cl a alp-photon耦合$ g_ {aγ} \ gtrsim 3.9-7.9-7.8 \ times 10^times 10^} $ for $ m_ {a} \ Lessim 4 \ times10^{ - 7}〜\ mathrm {ev} $，具体取决于磁场上的假设和原始伽马射线频谱。这种新的结合与未来实验的非常高能伽马射线实验和敏感性的其他ALP约束相辅相成。
The detection of very high-energy neutrinos by IceCube experiment supports the existence of a comparable gamma-ray counterpart from the same cosmic accelerators. Under the likely assumption that the sources of these particles are of extragalactic origin, the emitted photon flux would be significantly absorbed during its propagation over cosmic distances. However, in the presence of photon mixing with ultra-light axion-like-particles (ALPs), this expectation would be strongly modified. Notably, photon-ALP conversions in the host galaxy would produce an ALP flux which propagates unimpeded in the extragalactic space. Then, the back-conversion of ALPs in the Galactic magnetic field leads to a diffuse high-energy photon flux. In this context, the recent detection of the diffuse high-energy photon flux by the Large High Altitude Air Shower Observatory (LHAASO) allows us to exclude at the $95\%$ CL an ALP-photon coupling $g_{aγ}\gtrsim 3.9-7.8 \times 10^{-11}~\mathrm{GeV^{-1}}$ for $m_{a}\lesssim 4\times10^{-7}~\mathrm{eV}$, depending on the assumptions on the magnetic fields and on the original gamma-ray spectrum. This new bound is complementary with other ALP constraints from very-high-energy gamma-ray experiments and sensitivities of future experiments.
