标题： 基于耀变体甚高能观测限制暗光子参数 显示英文标题

标题： Constraining dark photon parameters based on the very high energy observations of blazars

摘要： 暗光子是标准模型之外的一种新规范玻色子，作为暗物质（DM）的候选者。暗光子暗物质（DPDM）通过动能混合与电磁场相互作用，暗示了一种利用河外超高能（VHE）源加以限制的方法。在这项工作中，我们试图从耀变体宿主星系中的光子-暗光子散射过程、星系际介质以及银河系中约束动能混合。来自耀变体的超高能光子会穿过超大质量黑洞附近的密集暗物质尖峰，在那里由于DPDM的吸收被显著增强。通过对马克良（Mrk）421和Mrk 501的观测，动能混合在95$\%$置信水平上被限制在$\epsilon \sim 10^{-7}$范围内，对应的暗光子质量范围为$m_{\rm D}\sim 0.03 - 1$eV。 显示英文摘要

摘要： Dark photon is a new gauge boson beyond the Standard Model as a kind of dark matter (DM) candidate. Dark photon dark matter (DPDM) interacts with electromagnetic fields via kinetic mixing, implicating an approach to give a constraint with extragalactic very high energy (VHE) sources. In this work, we attempt to constrain the kinetic mixing from the photon-dark photon scattering process in the host galaxy of blazar, the intergalactic medium and the Milky Way. The VHE photons from a blazar would pass through a dense DM spike around the supermassive black hole where the absorption from DPDM is dramatically enhanced. The kinetic mixing is constrained to be $\epsilon \sim 10^{-7}$ at a 95$\%$ confidence level with $m_{\rm D}\sim 0.03 - 1$ eV mass range from the observations of Markarian (Mrk) 421 and Mrk 501.