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arXiv · 2407.16628

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

Tian-Ci Liu·Ming-Xuan Lu·Xiao-Song Hu
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Abstract

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.

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Tian-Ci Liu, Ming-Xuan Lu, Xiao-Song Hu. 2024-07-23. Constraining dark photon parameters based on the very high energy observations of blazars. https://doi.org/10.1140/epjc%2Fs10052-024-13092-y

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