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arXiv 2602.23249astro-ph.HEgr-qchep-phhep-th
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轴子-光子混合与 extragalactic 磁场背景:平台区域、共振与非高斯增强

The Axion-Photon Mixing and the Extragalactic Magnetic Background: Plateau Regimes, Resonances, and Non-Gaussian Boosts

Sichuan University(四川大学);INFN, Laboratori Nazionali di Frascati(意大利国家核物理研究所,弗拉斯蒂国家实验室);University of Science and Technology of China(中国科学技术大学);CAS Key Laboratory for Researches in Galaxies and Cosmology, School of Astronomy and Space Science, University of Science and Technology of China(中国科学院星系与宇宙学重点实验室,中国科学技术大学天文与空间科学学院);Università di Napoli “Federico II”(那不勒斯费德里科二世大学);Scuola Superiore Meridionale(南方高等学院);Istituto Nazionale di Fisica Nucleare, Sezione di Napoli(意大利国家核物理研究所,那不勒斯分部);Università di Salerno(萨莱诺大学);INFN- Gruppo Collegato di Salerno(意大利国家核物理研究所,萨莱诺协作组)

Andrea Addazi, Yi-Fu Cai, Salvatore Capozziello, Qingyu Gan, Gaetano Lambiase

AI总结:

研究轴子-光子混合与 extragalactic 磁场背景,揭示非高斯性对光子存活率的增强效应及VHE伽马射线谱的观测意义。

摘要:

我们提出了轴子类粒子(ALP)与光子混合与 extragalactic 背景光(EBL)衰减的分析性处理,适用于常数、高斯随机和非高斯磁场配置。对于常数磁场,我们推导出精确的概率并识别出一个扰动平台区域,其中光子存活率与磁场的四次方成正比,将四点磁相关函数作为非高斯性敏感探测器。对于高斯随机磁场,我们首次获得了强衰减区域中非指数衰减成分的解析公式。与广泛使用的域状模型相反,光子存活率被抑制了4-6个数量级,同时转换和存活概率显示出与质量相等共振、随机共振和EBL衰减相关的不同多峰结构。扩展到非高斯磁场,我们显示非高斯性可以将光子存活率相对于高斯情况提高几个数量级,可能解释了LHAASO观测到的意外VHE光子事件。我们的结果表明,随机磁场不能简化为域状相干而不失去本质物理,且VHE伽马射线谱编码了关于星际磁场功率谱和非高斯结构的可观察信息——这对于下一代观测站推动至PeV灵敏度至关重要。

英文摘要:

We present an analytical treatment of Axion-Like-Particle (ALP)--photon mixing with extragalactic background light (EBL) attenuation for constant, Gaussian-stochastic, and non-Gaussian magnetic field configurations--with direct implications for Very High Energy (VHE) gamma-ray observations such as LHAASO, HAWC, and CTA experiments. For constant fields, we derive exact probabilities and identify a perturbative plateau regime where photon survival scales as quartic order of magnetic field, isolating the four-point magnetic correlation as a sensitive probe of non-Gaussianity. For Gaussian stochastic fields, we obtain--for the first time--analytical formulas for non-exponential-decay components in the strong-attenuation regime. Contrary to the widely used domain-like model, photon survival is suppressed by 4-6 orders of magnitude, while both conversion and survival probabilities exhibit distinct multi-peak structures from mass-equal resonance, stochastic resonance, and EBL attenuation. Extending to non-Gaussian fields, we show that non-Gaussianity can enhance photon survival by several orders of magnitude relative to the Gaussian case, potentially explaining the unexpectedly VHE photon event observed by LHAASO. Our results demonstrate that stochastic magnetic fields cannot be reduced to domain-like coherence without losing essential physics, and that VHE gamma-ray spectra encode observable information about both the power spectrum and non-Gaussian structure of intergalactic magnetic fields--critical as next-generation observatories push toward PeV sensitivities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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