论文标题
调解从高能量伽玛射线的轴突样粒子的提示
Reconciling hints on axion-like-particles from high-energy gamma rays with stellar bounds
论文作者
论文摘要
最近有两个不同的组声称，来自银河脉冲星和超新星残留物中的γ射线中观察到的光谱调制可能是由于光子转化为大型银河系磁场中的光子转化为超光轴测样粒子（ALP）。 While we show the required best-fit photon-ALP coupling, $g_{aγ} \sim 2 \times 10^{-10}$ GeV${}^{-1}$, to be consistent with constraints from observations of photon-ALPs mixing in vacuum, this is in conflict with other bounds, specifically from the CAST solar axion limit, from the helium-burning lifetime in globular簇，以及与SN 1987a一致的伽马射线的非观察。为了调和这些不同的结果，我们建议物质中的环境效应将抑制密集的天体血浆中的ALP产生，从而使以前的界限放宽，并使它们与低密度银河系介质中的光子ALP转化兼容。如果这种解释是正确的，则声称的ALP信号将取决于下一代实验室实验，例如阿尔卑斯山II。
It has been recently claimed by two different groups that the spectral modulation observed in gamma rays from Galactic pulsars and supernova remnants can be due to conversion of photons into ultra-light axion-like-particles (ALPs) in large-scale Galactic magnetic fields. While we show the required best-fit photon-ALP coupling, $g_{aγ} \sim 2 \times 10^{-10}$ GeV${}^{-1}$, to be consistent with constraints from observations of photon-ALPs mixing in vacuum, this is in conflict with other bounds, specifically from the CAST solar axion limit, from the helium-burning lifetime in globular clusters, and from the non-observations of gamma rays in coincidence with SN 1987A. In order to reconcile these different results, we propose that environmental effects in matter would suppress the ALP production in dense astrophysical plasma, allowing to relax previous bounds and make them compatible with photon-ALP conversions in the low-density Galactic medium. If this explanation is correct, the claimed ALP signal would be on the reach of next-generations laboratory experiments such as ALPS II.
